THE LONG GAMES AT CARCHARIAS

Rob Sanders

The end began with the Revenant Rex.

An interstellar beast. Bad omen of omens. A wanderer: she was a regular visitor to this part of the segmentum. The hulk was a drifting gravity well of twisted rock and metal. Vessels from disparate and distant races nestled, broken-backed amongst mineral deposits from beyond the galaxy’s borders and ice frozen from before the beginning of time. A demented logic engine at the heart of the hulk – like a tormented dreamer – guided the nightmare path of the beast through the dark void of Imperial sectors, alien empires of the Eastern Fringe and the riftspace of erupting maelstroms. Then, as if suddenly awoken from a fevered sleep, the daemon cogitator would initiate the countdown sequence of an ancient and weary warp drive. The planetkiller would disappear with the expediency of an answered prayer, destined to drift up upon the shores of some other bedevilled sector, hundreds of light years away.

The Revenant Rex beat the Aurora Chapter at Schindelgheist, the Angels Eradicant over at Theta Reticuli and the White Scars at the Martyrpeake. Unfortunately the hulk was too colossal and the timeframes too erratic for the cleanse-and-burn efforts of the Adeptus Astartes to succeed: but Chapter pride and zealotry ensured their superhuman efforts regardless. The behemoth was infested with greenskins of the Iron Klaw Clan – that had spent the past millennia visiting hit-and-run mayhem on systems across the segmentum, with abandoned warbands colonising planetary badlands like a green, galactic plague. The Warfleet Ultima, where it could gather craft in sufficient time and numbers, had twice attempted to destroy the gargantuan hulk. The combined firepower of hundreds of Navy vessels had also failed to destroy the beast, simply serving to enhance its hideous melange further.

All these things and more had preyed upon Elias Artegall’s conscience when the Revenant Rextumbled into the Gilead Sector. Arch-Deacon Urbanto. Rear Admiral Darracq. Overlord Gordius. Zimner, the High Magos Retroenginericus. Grand Master Karmyne of the Angels Eradicant. Artegall had either received them or received astrotelepathic messages from them all.

‘Chapter Master, the xenos threat cannot be tolerated…’

‘The Mercantile Gilead have reported the loss of thirty bulk freighters…’

‘Master Artegall, the greenskins are already out of control in the Despot Stars…’

‘That vessel could harbour ancient technological secrets that could benefit the future of mankind…’

‘You must avenge us, brother…’

The spirehalls of the Slaughterhorn had echoed with their demands and insistence. But to war was a Space Marine’s prerogative. Did not Lord Guilliman state on the steps of the Plaza Ptolemy: ‘There is but one of the Emperor’s Angels for every world in the Imperium; but one drop of Adeptus Astartes blood for every Imperial citizen. Judge the necessity to spill such a precious commodity with care and if it must be spilt, spill it wisely, my battle-brothers.’

Unlike the Scars or the Auroras, Artegall’s Crimson Consuls were not given to competitive rivalry. Artegall did not desire success because others had failed. Serving at the pleasure of the primarch was not a tournament spectacle and the Revenant Rex was not an opportunistic arena. In the end, Artegall let his battered copy of the Codex Astartes decide. In those much-thumbed pages lay the wisdom of greater men than he: as ever, Artegall put his trust in their skill and experience. He chose a passage that reflected his final judgement and included it in both his correspondence to his far-flung petitioners and his address to the Crimson Consuls, First Company on board the battle-barge Incarnadine Ecliptic.

‘From Codicil CC-LXXX-IV.ii: The Coda of Balthus Dardanus, 17th Lord of Macragge – entitledStaunch Supremacies. “For our enemies will bring us to battle on the caprice of chance. The alien and the renegade are the vagaries of the galaxy incarnate. What can we truly know or would want to of their ways or motivations? They are to us as the rabid wolf at the closed door that knows not even its own mind. Be that door. Be the simplicity of the steadfast and unchanging: the barrier between what is known and the unknowable. Let the Imperium of Man realise its manifold destiny within while without its mindless foes dash themselves against the constancy of our adamantium. In such uniformity of practice and purpose lies the perpetuity of mankind.” May Guilliman be with you.’

‘And with you,’ Captain Bolinvar and his crimson-clad 1st Company Terminator Marines had returned. But the primarch had not been with them and Bolinvar and one hundred veteran sons of Carcharias had been forsaken.

Artegall sat alone in his private Tactical Chancelorium, among the cold ivory of his throne. The Chancelorium formed the very pinnacle of the Slaughterhorn – the Crimson Consuls fortress-monastery – which in turn formed the spirepeak of Hive Niveous, the Carcharian capital city. The throne was constructed from the colossal bones of shaggy, shovel-tusk Stegodonts, hunted by Carcharian ancestors, out on the Dry-blind. Without his armour the Chapter Master felt small and vulnerable in the huge throne – a sensation usually alien to an Adeptus Astartes’ very being. The chamber was comfortably gelid and Artegall sat in his woollen robes, elbow to knee and fist to chin, like some crumbling statue from Terran antiquity.

The Chancelorium began to rumble and this startled the troubled Chapter Master. The crimson-

darkness swirl of the marble floor began to part in front of him and the trapdoor admitted a rising platform upon which juddered two Chapter serfs in their own zoster robes. They flanked a huge brass pict-caster that squatted dormant between them. The serfs were purebred Carcharians with their fat, projecting noses, wide nostrils and thick brows. These on top of stocky, muscular frames, barrel torsos and thick arms decorated with crude tattoos and scar-markings. Perfectly adapted for life in the frozen underhive.

‘Where is your master, the Chamber Castellan?’ Artegall demanded of the bondsmen. The first hailed his Chapter Master with a fist to the aquila represented on the Crimson Consuls crest of his robes.

‘Returned presently from the underhive, my lord – at your request – with the Lord Apothecary,’ the serf answered solemnly. The second activated the pict-caster, bringing forth the crystal screen’s grainy picture.

‘We have word from the Master of the Fleet, Master Artegall,’ the serf informed him.

Standing before Artegall was an image of Hecton Lambert, Master of the Crimson Consuls fleet. The Space Marine commander was on the bridge of the strike cruiser Anno Tenebris, high above the gleaming, glacial world of Carcharias.

‘Hecton, what news?’ Artegall put to him without the usual formality of a greeting.

‘My master: nothing but the gravest news,’ the Crimson Consul told him. ‘As you know, we have been out of contact with Captain Bolinvar and the Incarnadine Ecliptic for days. A brief flash on one of our scopes prompted me to despatch the frigate Herald Angel with orders to locate the Ecliptic and report back. Twelve hours into their search they intercepted the following pict-cast, which they transmitted to the Anno Tenebris, and which I now dutifully transmit to you. My lord, with this every man on board sends his deepest sympathies. May Guilliman be with you.’

‘And with you,’ Artegall mouthed absently, rising out of the throne. He took a disbelieving step towards the broad screen of the pict-caster. Brother Lambert disappeared and was replaced by a static-laced image, harsh light and excruciating noise. The vague outline of a Crimson Consuls Space Marine could be made out. There were sparks and fires in the background, as well as the silhouettes of injured Space Marines and Chapter serfs stumbling blind and injured through the smoke and bedlam. The Astartes identified himself but his name and rank were garbled in the intruding static of the transmission.

‘…this is the battle-barge Incarnadine Ecliptic, two days out of Morriga. I am now ranking battle-brother. We have sustained critical damage…’ The screen erupted with light and interference.

Then: ‘Captain Bolinvar went in with the first wave. Xenos resistance was heavy. Primitive booby traps. Explosives. Wall-to-wall green flesh and small arms. By the primarch, losses were minimal; my injuries, though, necessitated my return to the Ecliptic. The captain was brave and through the use of squad rotations, heavy flamers and teleporters our Consul Terminators managed to punch through to an enginarium with a power signature. We could all hear the countdown, even over the vox. Fearing that the Revenant Rex was about to make a warp jump I begged the captain to return. I begged him, but he transmitted that the only way to end the hulk and stop the madness was to sabotage the warp drive.’

Once again the lone Space Marine became enveloped in an ominous, growing brightness. ‘His final transmission identified the warp engine as active but already sabotaged. He said the logic engine wasn’t counting down to a jump... Then, the Revenant Rex, it – it just, exploded. The sentry ships were caught in the blast wave and the Ecliptic wrecked.’

A serf clutching some heinous wound to his face staggered into the reporting Space Marine. ‘Go! To the pods,’ he roared at him. Then he returned his attention to the transmission. ‘We saw it all. Detonation of the warp engines must have caused some kind of immaterium anomaly. Moments after the hulk blew apart, fragments and debris from the explosion – including our sentry ships – were sucked back through a collapsing empyrean vortex before disappearing altogether. We managed to haul off but are losing power and have been caught in the gravitational pull of a nearby star. Techmarine Hereward has declared the battle-barge unsalvageable. With our orbit decaying I have ordered all surviving Adeptus Astartes and Chapter serfs to the saviour pods. Perhaps some may break free. I fear our chances are slim… May Guilliman be with us…’

As the screen glared with light from the damning star and clouded over with static, Artegall felt like he’d been speared through the gut. He could taste blood in his mouth: the copper tang of lives lost. One hundred Crimson Consuls. The Emperor’s Angels under his command. The Chapter’s best fighting supermen, gone with the irreplaceable seed of their genetic heritage. Thousands of years of combined battle experience lost to the Imperium. The Chapter’s entire inheritance of Tactical Dreadnought Armour: every suit a priceless relic in its own right. The venerable Ecliptic. A veteran battle-barge of countless engagements and a piece of Caracharias among the stars. All gone. All claimed by the oblivion of the warp or cremated across the blazing surface of a nearby sun.

‘You must avenge us, brother–’

Artegall reached back for his throne but missed and staggered. Someone caught him, slipping their shoulders underneath one of his huge arms. It was Baldwin. He’d been standing behind Artegall, soaking up the tragedy like his Chapter Master. The Space Marine’s weight alone should have crushed the Chamber Castellan, but Baldwin was little more than a mind and a grafted, grizzled face on a robe-swathed brass chassis. The serf’s hydraulics sighed as he took his master’s bulk.

‘My lord,’ Baldwin began in his metallic burr.

‘Baldwin, I lost them…’ Artegall managed, his face a mask of stricken denial. With a clockwork clunk of gears and pistons the Chamber Castellan turned on the two serfs flanking the pict-caster.

‘Begone!’ he told them, his savage command echoing around the bronze walls of the Chancelorium. As the bondsmen thumped their fists into their aquilas and left, Baldwin helped his master to the cool bone of his throne. Artegall stared at the serf with unseeing eyes. They had been recruited together as savage underhivers and netted, kicking and pounding, from the fighting pits and tribal stomping grounds of the abhuman-haunted catacombs of Hive Niveous. But whereas Artegall had passed tissue compatibility and become a Neophyte, Baldwin had fallen at the first hurdle. Deemed unsuitable for surgical enhancement, the young hiver was inducted as a Chapter serf and had served the Crimson Consuls ever since. As personal servant, Baldwin had travelled the galaxy with his superhuman master.

As the decades passed, Artegall’s engineered immortality and fighting prowess brought him promotion, while Baldwin’s all-too-human body brought him the pain and limitation of old age. When Elias Artegall became the Crimson Consuls’ Chapter Master, Baldwin wanted to serve on as his Chamber Castellan. As one century became the next, the underhiver exchanged his wasted frame for an engineered immortality of his own: the brass bulk of cylinders, hydraulics and exo-skeletal appendages that whirred and droned before the throne. Only the serf’s kindly face and sharp mind remained.

Baldwin stood by as Artegall’s body sagged against the cathedra arm and his face contorted with silent rage. It fell with futility before screwing up again with the bottomless fury only an Adeptus Astartes could feel for his foes and himself. Before him the Crimson Consul could see the faces of men with whom he’d served. Battle-brothers who had been his parrying arm when his own had been employed in death-dealing; Space Marines who had shared with him the small eternities of deep space patrol and deathworld ambush; friends and loyal brethren.

‘I sent them,’ he hissed through the perfection of his gritted teeth.

‘It is as you said to them, my lord. As the Codex commanded.’

‘Condemned them…’

‘They were the door that kept the rabid wolf at bay. The adamantium upon which our enemies must be dashed.’

Artegall didn’t seem to hear him: ‘I walked them into a trap.’

‘What is a space hulk if it not be such a thing? The sector is safe. The Imperium lives on. Such an honour is not without cost. Even Guilliman recognises that. Let me bring you the comfort of his words, my master. Let the primarch show us his way.’

Artegall nodded and Baldwin hydraulically stomped across the chamber to where a lectern waited on a gravitic base. The top of the lectern formed a crystal case that the Castellan opened, allowing the preservative poison of argon gas to escape. Inside, Artegall’s tattered copy of the Codex Astartes lay open as it had done since the Chapter Master had selected his reading for the 1st Company’s departure. Baldwin drifted the lectern across the crimson marble of the Chancelorium floor to the throne’s side. Artegall was on his feet. Recovered. A Space Marine again. A Chapter Master with the weight of history and the burden of future expectation on his mighty Astartes’ shoulders.

‘Baldwin,’ he rumbled with a steely-eyed determination. ‘Were your recruitment forays into the underhive with the Lord Apothecary fruitful?’

‘I believe so, my lord.’

‘Good. The Chapter will need Carcharias to offer up its finest flesh, on this dark day. You will need to organise further recruitment sweeps. Go deep. We need the finest savages the hive can offer. Inform Lord Fabian that I have authorised cultivation of our remaining seed. Tell him I need one hundred Crimson sons. Demi gods all, to honour the sacrifice of their fallen brethren.’

‘Yes, Chapter Master.’

‘And Baldwin.’

‘My master?’

‘Send for the Reclusiarch.’

‘High Chaplain Enobarbus is attached to the 10th Company,’ Baldwin informed Artegall with gentle, metallic inflection. ‘On training manoeuvres in the Dry-blind.’

‘I don’t care if he’s visiting Holy Terra. Get him here. Now. There are services to organise. Commemorations. Obsequies. The like this Chapter has never known. See to it.’

‘Yes, my master,’ Baldwin answered and left his lord to his feverish guilt and the cold words of Guilliman.

‘By now your lids are probably frozen to your eyeballs,’ growled High Chaplain Enobarbus over the vox-link. ‘Your body no longer feels like your own.’

The Crimson Consuls Chaplain leant against the crumbling architecture of the Archaphrael Hive and drank in the spectacular bleakness of his home world. The Dry-blind extended forever in all directions: the white swirl, like a smazeous blanket of white, moulded from the ice pack. By day, with the planet’s equally bleak stars turning their attentions on Carcharias, the dry ice that caked everything in a rime of frozen carbon dioxide bled a ghostly vapour. The Dry-blind, as it was called, hid the true lethality of the Carcharian surface, however. A maze of bottomless crevasses, fissures and fractures that riddled the ice beneath and could only be witnessed during the short, temperature-plummeting nights, when the nebulous thunderhead of dry ice sank and re-froze.

‘Your fingers are back in your cells, because they sure as Balthus Dardanus aren’t part of your hands any more. Hopes of pulling the trigger on your weapon are a distant memory,’ the High Chaplain voxed across the open channel.

The Chaplain ran a gauntlet across the top of his head, clearing the settled frost from his tight dreadlocks and flicking the slush at the floor. With a ceramite knuckle, he rubbed at the socket of the eye he’d lost on New Davalos. Now stapled shut, a livid scar ran down one side of his brutal face, from the eyelid to his jaw, where tears constantly trickled in the cold air and froze to his face.

‘Skin is raw: like radiation burns – agony both inside and out.’

From his position in the twisted, frost-shattered shell that had been the Archaphrael Hive, Enobarbus could hear fang-face shredders. He fancied he could even spot the tell-tale vapour wakes of the shredders’ dorsal fins cutting through the Dry-blind. Archaphrael Hive made up a triumvirate of cities called the Pale Maidens that stood like ancient monuments to the fickle nature of Carcharian meteorology. A thousand years before the three cities had been devastated by a freak polar cyclone colloquially referred to as ‘The Big One’ by the hivers. Now the ghost hives were used by the Crimson Consuls as an impromptu training ground.

‘And those are the benefits,’ Enobarbus continued, the High Chaplain’s oratory sailing out across the vox waves. ‘It’s the bits you can’t feel that you should worry about. Limbs that died hours ago. Dead meat that you’re dragging around. Organs choking on the slush you’re barely beating around your numb bodies.’

He had brought the 10th Company’s 2nd and 7th Scout sniper squads out to the Pale Maidens for stealth training and spiritual instruction. As a test of their worth and spirit, Enobarbus had had the Space Marine Scouts establish and hold ambush positions with their sniper rifles in the deep Carcharian freeze for three days. He had bombarded them endlessly with remembered readings from the Codex Astartes, faith instruction and training rhetoric across the open channels of the vox.

Behind him Scout-Sergeant Caradoc was adjusting his snow cloak over the giveaway crimson of his carapace armour plating and priming his shotgun. Enobarbus nodded and the Scout-sergeant melted into the misty, frost-shattered archways of the Archaphrael Hive.

While the Scouts held their agonising positions, caked and swathed in dry ice, Enobarbus and the Scout-sergeants had amused themselves by trapping fang-face shredders. Packs of the beasts roamed the Dry-blind, making the environment an ever more perilous prospect for travellers. The shredders had flat, shovel-shaped maws spilling over with needle-like fangs. They carried their bodies close to the ground and were flat but for the razored dorsal fin protruding from their knobbly spines. They used their long tails for balance and changing direction on the ice. Like their dorsals, the tails were the razor-edged whiplash that gave them their name. Their sharp bones were wrapped in an elastic skin-sheen that felt almost amphibious and gave the beasts the ability to slide downhill and toboggan their prey. Then they would turn their crystal-tip talons on their unfortunate victims: shredding grapnels that the creatures used to climb up and along the labyrinthine crevasses that fractured the ice shelf.

‘This is nothing. Lips are sealed with rime. Thought is slow. It’s painful. It’s agony. Even listening to this feels like more than you can bear.’

Enobarbus pulled his own cape tight about his power armour. Like many of his calling the High Chaplain’s plate was ancient and distinct, befitting an Adeptus Astartes of his status, experience and wisdom. Beyond the heraldry and honorifica decorating his midnight adamantium shell and the skullface helmet hanging from his belt, Enobarbus sported the trappings of his home world. The shredder-skin cape hung over his pack, with its razor dorsal and flaps that extended down his arms and terminated in the skinned creature’s bestial claws: one decorating each of the High Chaplain’s gauntlets.

‘But bear it you must, you worthless souls. This is the moment your Emperor will need you. When you feel you have the least to give: that’s when your primarch demands the most from you. When your battle-brother is under the knife or in another’s sights – this is when you must be able to act,’ the High Chaplain grizzled down the vox with gravity. Switching to a secure channel Enobarbus added, ‘Sergeant Notus: now, if you will.’

Storeys and storeys below, down in the Dry-blind where Enobarbus and the Scout-sergeants had penned their captured prey, Notus would be waiting for the signal. A signal the Chaplain knew he’d received because of the high-pitched screeches of the released pack of shredders echoing up the shattered chambers and frost-bored ruins of the hive interior. The Codex Astartes taught of the nobility of aeon-honoured combat tactics and battle manoeuvres perfectly realised. It was Guilliman’s way. The Rules of Engagement. The way in which Enobarbus was instructing his Scouts. But in their war games about the Pale Maidens, Enobarbus wasn’t playing the role of the noble Space Marine. He was everything else the galaxy might throw at them: and the enemies of the Astartes did not play by the rules.

With the Scout Marines undoubtedly making excellent use of the hive’s elevation and dilapidated exterior – as scores of previous Neophytes had – Enobarbus decided to engage them on multiple fronts at once. While the starving shredders clawed their way up through the ruined hive, intent on ripping the frozen Scouts to pieces, Scout-Sergeant Caradoc was working his way silently down through the derelict stairwells and halls of the hive interior with his shotgun. The High Chaplain decided to come at his Scouts from an entirely different angle.

Slipping his crozius arcanum – the High Chaplain’s sacred staff of office – from his belt and extending the shredder talons on the backs of his gauntlets, Enobarbus swung out onto the crumbling hive wall exterior and began a perilous climb skywards. The shell of the hive wall had long been undermined by the daily freeze-thaw action of Caracharian night and day. Using the sharpened point of the aquila’s wings at the end of his crozius like an ice pick and the crystal-tip claws of the shredder, the High Chaplain made swift work of the frozen cliff-face of the dilapidated hive.

‘There is nothing convenient about your enemy’s desires. He will come for you precisely in the moment you have set aside for some corporal indulgence,’ Enobarbus told the Scouts, trying hard not to let his exertions betray him over the vox. ‘Exhaustion, fear, pain, sickness, injury, necessities of the body and as an extension of your bodies, the necessities of your weapons. Keep your blade keen and your sidearm clean. Guilliman protect you on the reload: the most necessary of indulgences – a mechanical funeral rite.’

Heaving himself up through the shattered floor of a gargoyle-encrusted overhang, the High Chaplain drew his bolt pistol and crept through to a balcony. The tier-terrace was barely stable but commanded an excellent view: too much temptation for a sniper Scout. But as Enobarbus stalked out across the fragile space he found it deserted. The first time in years of such training exercises he’d discovered it as such.

The High Chaplain nodded to himself. Perhaps this cohort of Neophytes was better. Perhaps they were learning faster: soaking up the wisdom of Guilliman and growing into their role. Perhaps they were ready for their Black Carapace and hallowed suits of power armour. Emperor knows they were needed. Chapter Master Artegall had insisted that Enobarbus concentrate his efforts on the 10th Company. The Crimson Consuls had had their share of past tragedies.

The Chapter had inherited the terrible misfortune of a garrison rotation on the industrial world of Phaethon IV when the Celebrant Chapter could not meet their commitments. Word was sent that the Celebrants were required to remain on Nedicta Secundus and protect the priceless holy relics of the cardinal world from the ravages of Hive Fleet Kraken and its splintered tyranid forces. Phaethon IV, on the other hand, bordered the Despot Stars and had long been coveted by Dregz Wuzghal, Arch-Mogul of Gunza Major. The Crimson Consuls fought bravely on Phaethon IV, and would have halted the beginnings of Waaagh! Wuzghal in its tracks: something stirred under the factories and power plants of the planet, however. Something awoken by the nightly bombing raids of the Arch-Mogul’s ‘Green Wing’. Something twice as alien as the degenerate greenskins: unfeeling, unbound and unstoppable. An ancient enemy, long forgotten by the galaxy and entombed below the assembly lines and Imperial manufacturing works of Phaethon, skeletal nightmares of living silver: the necrons. Between greenskin death from above and tomb warriors crawling out of their stasis chambers below, the industrial worlders and their Crimson Consuls guardians hadn’t stood a chance and the Chapter lost two highly-decorated companies. As far as Enobarbus knew, the necron and the Arch-Mogul fought for Phaethon still.

The High Chaplain held his position. The still air seared the architecture around him with its caustic frigidity. Enobarbus closed his eyes and allowed his ears to do the work. He filtered out the freeze-thaw expansion of the masonry under his boots, the spiritual hum of the sacred armour about his body and the creak of his own aged bones. There it was. The tell-tale scrape of movement, the tiniest displacement of weight on the balcony expanse above. Back-tracking, the High Chaplain found a craterous hole in the ceiling. Hooking his crozius into the ruined stone and corroded metal, the Crimson Consul heaved himself noiselessly up through the floor of the level above.

Patient, like a rogue shredder on ambush in the Dry-blind – masked by the mist and hidden in some ice floor fissure – Enobarbus advanced with agonising care across the dilapidated balcony. There he was. One of the 10th Company Scouts. Flat to the steaming floor, form buried in his snow cloak, helmet down at the scope of his sniper rifle: a position the Neophyte had undoubtedly held for days. The balcony was an excellent spot. Despite some obstructive masonry, it commanded a view of the Dry-blind with almost the same breathtaking grandeur of the platform below. Without a sound, Enobarbus was above the sniper Scout, the aquila-wing blade-edge of his crozius resting on the back of the Scout’s neck, between the helmet and the snow cloak.

‘The cold is not the enemy,’ the High Chaplain voxed across the open channel. ‘The enemy is not even the enemy. You are the enemy. Ultimately you will betray yourself.’

When the Scout didn’t move, the Chaplain’s lip curled with annoyance. He locked his suit vox-channels and hooked the Scout’s shoulder with the wing-tip of the crozius.

‘It’s over, Consul,’ Enobarbus told the prone form. ‘The enemy has you.’

Flipping the Scout over, Enobarbus stood there in silent shock. Cloak, helmet and rifle were there but the Scout was not. Instead, the butchered body of a Shredder lay beneath, with the hilt of a gladius buried in its fang-faced maw. Enobarbus shook his head. Anger turned to admiration. These Scouts would truly test him.

Enobarbus switched to the private channel he shared with Scout-Sergeant Notus to offer him brief congratulations on his Scouts and to direct him up into the ruined hive.

‘What in Guilliman’s name are–’ Enobarbus heard upon the transferring frequency. Then the unmistakable whoosh of las-fire. The High Chaplain heard the Scout-sergeant roar defiance over the vox and looking out over the Dry-blind, Enobarbus saw the light show, diffused in the swirling miasma, like sheet lightning across a stormy sky. Something cold took hold of the High Chaplain’s heart. Enobarbus had heard thousands of men die. Notus was dead.

Transferring channels, Enobarbus hissed, ‘Override Obsidian: we are under attack. This is not a drill. 2nd and 7th, you are cleared to fire. Sergeant Caradoc, meet me at the–’

Shotgun blasts. Rapid and rushed. Caradoc pressed by multiple targets. The crash of the weapon bounced around the maze of masonry and worm-holed architecture.

‘Somebody get me a visual,’ the High Chaplain growled over the vox before slipping the crozius into his belt. Leading with his bolt pistol, Enobarbus raced for the fading echo of the sergeant’s weapon. Short sprints punctuated with skips and drops through holes and stairwells.

‘Caradoc, where are you?’ Enobarbus voxed as he threaded his way through the crumbling hive. The shotgun fire had died away but the Scout-sergeant wasn’t replying. ‘2nd squad, 7th squad, I want a visual on Sergeant Caradoc, now!’

But there was nothing: only an eerie static across the channel. Rotating through the frequencies, Enobarbus vaulted cracks and chasms and thundered across frost-hazed chambers.

‘Ritter, Lennox, Beade…’ the High Chaplain cycled but the channels were dead. Sliding down into a skid, the shredder-skin cape and the greave plates of his armour carrying him across the chamber floor, Enobarbus dropped down through a hole and landed in a crouch. His pistol was everywhere, pivoting around and taking in the chamber below. An Astartes shotgun lay spent and smoking nearby and a large body swung from a creaking strut in the exposed ceiling. Caradoc.

The Scout-sergeant was hanging from his own snow cloak, framed in a gaping hole in the exterior hive wall, swinging amongst the brilliance of the Dry-blind beyond. The cloak, wrapped around his neck as it was, had been tied off around the strut like a noose. This wouldn’t have been enough to kill the Space Marine. The dozen gladius blades stabbed through his butchered body up to their hilts had done that. The sickening curiosity of such a vision would have been enough to stun most battle-brothers but Enobarbus took immediate comfort and instruction from his memorised Codex. There was protocol to follow. Counsel to heed.

Snatching his skull-face helmet from his belt, Enobarbus slapped it on and secured the seals. With pistol still outstretched in one gauntlet, the High Chaplain felt for the rosarius hanging around his neck. He would have activated the powerful force field generator but an enemy was already upon him. The haze of the chamber was suddenly whipped up in a rush of movement. Shredders. Lots of them. They came out of the floor. Out of the roof. Up the exterior wall, as the High Chaplain had. Snapping at him with crystal claws and maws of needle-tip teeth. Enobarbus felt their razored tails slash against his adamantium shell and the vice-like grip of their crushing, shovel-head jaws on his knees, his shoulder, at his elbows and on his helmet.

Bellowing shock and frustration, Enobarbus threw his arm around, dislodging two of the monsters. As they scrambled about on the floor, ready to pounce straight back at him, the High Chaplain ended them with his bolt pistol. Another death-dealer tore at him from behind and swallowed his pistol and gauntlet whole. Again, Enobarbus fired, his bolt-rounds riddling the creature from within. The thing died with ease but its dagger-fang jaws locked around his hand and weapon, refusing to release. The darkness of holes and fractured doorways continued to give birth to the Carcharian predators. They bounded at him with their merciless, ice-hook talons, vaulting off the walls, floor and ceiling, even off Caradoc’s dangling corpse.

Snatching the crozius arcanum from his belt the High Chaplain thumbed the power weapon to life. Swinging it about him in cold fury, Enobarbus cleaved shredders in two, slicing the monsters through the head and chopping limbs and tails from the beasts.

The floor erupted in front of the Space Marine and a hideously emaciated shredder – big, even for its kind – came up through the frost-shattered masonry. It leapt at Enobarbus, jaws snapping shut around his neck and wicked talons hooking themselves around the edges of his chest plate. The force of the impact sent the High Chaplain flailing backwards, off balance and with shredders hanging from every appendage.

Enobarbus roared as his armoured form smashed through part of a ruined wall and out through the gap in the hive exterior. The Crimson Consul felt himself falling. Survival instinct causing his fist to open, allowing the crozius to be torn from him by a savage little shredder. Snatching at the rapidly disappearing masonry, Enobarbus elongated his own shredder claw and buried the crystal-tip talon in the ancient rockcrete. The High Chaplain hung from two monstrous digits, shredders in turn hanging from his armour. With the dead-weight and locked jaw of the pistol-swallowing shredder on the other arm and the huge beast now hanging down his back from a jaw-hold on his neck, Enobarbus had little hope of improving his prospects. Below lay thousands of metres of open drop, a ragged cliff-face of hive masonry to bounce off and shredder-infested, bottomless chasms of ice waiting below the white blanket of the Dry-blind. Even the superhuman frame of the High Chaplain could not hope to survive such a fall.

Above the shrieking and gnawing of the beasts and his own exertions, Enobarbus heard the hammer of disciplined sniper fire. Shredder bodies cascaded over the edge past the High Chaplain, either blasted apart by the accurate las-fire or leaping wildly out of its path. Enobarbus looked up. The two talons from which he hung scraped through the rockcrete with every purchase-snapping swing of the monsters hanging from the Crimson Consul. There were figures looking down at him from the edge. Figures in helmets and crimson carapace, swathed in snow cloaks and clutching sniper rifles. On the level above was a further collection looking down at him and the same on the storey after that.

Enobarbus recognised the Scout standing above him.

‘Beade…’ the High Chaplain managed, but there was nothing in the blank stare or soulless eyes of the Neophyte to lead Enobarbus to believe that he was going to live. As the barrel of Beade’s rifle came down in unison with his Space Marine Scout compatriots, the High Chaplain’s thoughts raced through a lifetime of combat experience and the primarch’s teaching. But Roboute Guilliman and his Codex had nothing for him and, with synchronous trigger-pulls that would have been worthy of a firing squad, High Chaplain Enobarbus’s las-slashed corpse tumbled into the whiteness below.

The Oratorium was crowded with hulking forms, their shadows cutting through the hololithic graphics of the chamber. Each Crimson Consul was a sculpture in muscle, wrapped in zoster robes and the colour of their calling. Only the two Astartes on the Oratorium door stood in full cream and crimson ceremonial armour, Sergeants Ravenscar and Bohemond watching silently over their brothers at the circular runeslab that dominated the chamber. The doors parted and Baldwin stomped in with the hiss of hydraulic urgency, accompanied by a serf attendant of his own. The supermen turned.

‘The Reclusiarch has not returned as ordered, master,’ Baldwin reported. ‘Neither have two full Scout squads of the 10th Company and their sergeants.’

‘It’s the time of year I tell you,’ the Master of the Forge maintained through his conical faceplate. Without his armour and colossal servo-claw, Maximagne Ferro cut a very different figure. Ferro wheezed a further intake of breath through his grilles before insisting: ‘Our relay stations on De Vere and Thusa Minor experience communication disruption from starquakes every year around the Antilochal Feast day.’

The Slaughterhorn’s Master of Ordnance, Talbot Faulks, gave Artegall the intensity of his magnobionic eyes, their telescrew mountings whirring to projection. ‘Elias. It’s highly irregular: and you know it.’

‘Perhaps the High Chaplain and his men have been beset by difficulties of a very natural kind,’ Lord Apothecary Fabian suggested. ‘Reports suggest carbonic cyclones sweeping in on the Pale Maidens from the east. They could just be waiting out the poor conditions.’

‘Enjoying them, more like,’ Chaplain Mercimund told the Apothecary. ‘The Reclusiarch would loathe missing an opportunity to test his pupils to their limits. I remember once, out on the–’

‘Forgive me, Brother-Chaplain. After the Chapter Master’s recall?’ the Master of Ordnance put to him. ‘Not exactly in keeping with the Codex.’

‘Brothers, please,’ Artegall said, leaning thoughtfully against the runeslab on his fingertips. Hololithics danced across his grim face, glinting off the neat rows of service studs running above each eyebrow. He looked at Baldwin. ‘Send the 10th’s Thunderhawks for them with two further squads for a search, if one is required.’

Baldwin nodded and despatched his attendant. ‘Chaplain,’ Artegall added, turning on Mercimund. ‘If you would be so good as to start organising the commemorations, in the High Chaplain’s absence.’

‘It would be an honour, Chapter Master,’ Mercimund acknowledged, thumping his fist into the Chapter signature on his robes earnestly before following the Chamber Castellan’s serf out of the Oratorium. Baldwin remained.

‘Yes?’ Artegall asked.

Baldwin looked uncomfortably at Lord Fabian, prompting him to clear his throat. Artegall changed his focus to the Apothecary. ‘Speak.’

‘The recruitment party is long returned from the underhive. Your Chamber Castellan and I returned together – at your request – with the other party members and the potential aspirants. Since they were not requested, Navarre and his novice remained on some matter of significance: the Chief Librarian did not share it with me. I had the Chamber Castellan check with the Librarium…’

‘They are as yet to return, Master Artegall,’ Baldwin inserted.

‘Communications?’

‘We’re having some difficulty reaching them,’ Baldwin admitted.

Faulks’s telescopic eyes retracted. ‘Enobarbus, the Crimson Tithe, the Chief Librarian…’

‘Communication difficulties, all caused by seasonal starquakes, I tell you,’ Maximagne Ferro maintained, his conical faceplate swinging around to each of them with exasperation. ‘The entire hive is probably experiencing the same.’

‘And yet we can reach Lambert,’ Faulks argued.

Artegall pursed his lips: ‘I want confirmation of the nature of the communication difficulties,’ he put to the Master of the Forge, prompting the Techmarine to nod slowly. ‘How long have Captain Baptista and the Crimson Tithe been out of contact?’

‘Six hours,’ Faulks reported.

Artegall looked down at the runeslab. With the loss of the Chapter’s only other battle-barge, Artegall wasn’t comfortable with static from the Crimson Tithe.

‘Where is she? Precisely.’

‘Over the moon of Rubessa: quadrant four-gamma, equatorial west.’

Artegall fixed his Chamber Castellan with cold, certain eyes.

‘Baldwin, arrange a pict-link with Master Lambert. I wish to speak with him again.’

‘You’re going to send Lambert over to investigate?’ Faulks enquired.

‘Calm yourself, brother,’ Artegall instructed the Master of Ordnance. ‘I’m sure it is as Ferro indicates. I’ll have the Master of the Fleet take the Anno Tenebris to rendezvous with the battle-barge over Rubessa. There Lambert and Baptista can have their enginseers and the Sixth Reserve Company’s Techmarines work on the problem from their end.’

Baldwin bowed his head. The sigh of hydraulics announced his intention to leave. ‘Baldwin,’ Artegall called, his eyes still on Faulks. ‘On your way, return to the Librarium. Have our astropaths and Navarre’s senior Epistolary attempt to reach the Chief Librarian and the Crimson Tithe by psychic means.’

‘My lord,’ Baldwin confirmed and left the Oratorium with the Master of the Forge.

‘Elias,’ Faulks insisted as he had done earlier. ‘You must let me take the Slaughterhorn to Status Vermillion.’

‘That seems unnecessary,’ the Lord Apothecary shook his head.

‘We have two of our most senior leaders unaccounted for and a Chapter battle-barge in a communications black-out,’ Faulks listed with emphasis. ‘All following the loss of one hundred of our most experienced and decorated battle-brothers? I believe that we must face the possibility that we are under some kind of attack.’

‘Attack?’ Fabian carped incredulously. ‘From whom? Sector greenskins? Elias, you’re not entertaining this?’

Artegall remained silent, his eyes following the path of hololithic representations tracking their way across the still air of the chamber.

‘You have started preparing the Chapter’s remaining gene-seed?’ Artegall put to the Lord Apothecary.

‘As you ordered, my master,’ Fabian replied coolly. ‘Further recruiting sweeps will need to be made. I know the loss of the First Company was a shock and this on top of the tragedies of Phaethon IV. But, this is our Chapter’s entire stored genetic heritage we are talking about here. You have heard my entreaties for caution with this course of action.’

‘Caution,’ Artegall nodded.

‘Elias,’ Faulks pressed.

‘As in all things,’ Artegall put to his Master of Ordnance and the Apothecary, ‘we shall be guided by Guilliman. The Codex advises caution in the face of the unknown – Codicil MX-VII-IX.i: The Wisdoms of Hera, “Gather your wits, as the traveller gauges the depth of the river crossing with the fallen branch, before wading into waters wary.” Master Faulks, what would you advise?’

‘I would order all Crimson Consuls to arms and armour,’ the Master of Ordnance reeled off. ‘Thunderhawks fuelled and prepped in the hangers. Penitorium secured. Vox-checks doubled and the defence lasers charged for ground to orbit assault. I would also recall Roderick and the Seventh Company from urban pacification and double the fortress-monastery garrison.’

‘Anything else?’

‘I would advise Master Lambert to move all Crimson Consuls vessels to a similarly high alert status.’

‘That is a matter for Master of the Fleet. I will apprise him of your recommendations.’

‘So?’

Artegall gave his grim consent, ‘Slaughterhorn so ordered to Status Vermillion.’

‘I can’t raise the Slaughterhorn,’ Lexicanum Raughan Stellan complained to his Librarian Master.

‘We are far below the hive, my novice,’ the Chief Librarian replied, his power armour boots crunching through the darkness. ‘There are a billion tonnes of plasteel and rockcrete between us and the spire monastery. You would expect even our equipment to have some problems negotiating that. Besides, it’s the season for starquakes.’

‘Still...’ the Lexicanum mused.

The psykers had entered the catacombs: the lightless labyrinth of tunnels, cave systems and caverns that threaded their torturous way through the pulverised rock and rust of the original hive. Thousands of storeys had since been erected on top of the ancient structures, crushing them into the bottomless network of grottos from which the Crimson Consuls procured their most savage potential recruits. The sub-zero stillness was routinely shattered by murderous screams of tribal barbarism.

Far below the aristocratic indifference of the spire and the slavish poverty of the habs and industrial districts lay the gang savagery of the underhive. Collections of killers and their Carcharian kin, gathered for security or mass slaughter, blasting across the subterranean badlands for scraps and criminal honour. Below this kingdom of desperados and petty despots extended the catacombs, where tribes of barbaric brutes ruled almost as they had at the planet’s feral dawn. Here, young Carcharian bodies were crafted by necessity: shaped by circumstance into small mountains of muscle and sinew. Minds were sharpened to keenness by animal instinct and souls remained empty and pure. Perfect for cult indoctrination and the teachings of Guilliman.

Navarre held up his force sword, Chrysaor, the unnatural blade bleeding immaterial illumination into the darkness. It was short, like the traditional gladius of his Chapter and its twin, Chrysaen, sat in the inverse criss-cross of scabbards that decorated the Chief Librarian’s blue and gold chest plate. The denizens of the catacombs retreated into the alcoves and shadows at the abnormal glare of the blade and the towering presence of the armoured Adeptus Astartes.

‘Stellan, keep up,’ Navarre instructed. They had both been recruited from this tribal underworld – although hundreds of years apart. This familiarity should have filled the Carcharians with ease and acquaintance. Their Astartes instruction and training had realised in both supermen, however, an understanding of the untamed dangers of the place.

Not only would their kith and kin dash out their brains for the rich marrow in their bones, their degenerate brothers shared their dark kingdom with abhumans, mutants and wyrds, driven from the upper levels of the hive for the unsightly danger they posed. Navarre and Stellan had already despatched a shaggy, cyclopean monstrosity that had come at them on its knuckles with brute fury and bloodhunger.

Navarre and Stellan, however, were Adeptus Astartes: the Emperor’s Angels of Death and demigods among men. They came with dangers of their own. This alone would be enough to ensure their survival in such a lethal place. The Crimson Consuls were also powerful psykers: wielders of powers unnatural and warp-tapped. Without the techno-spectacle of their arms, the magnificence of their blue and gold plating, their superhuman forms and murderous training, Navarre and Stellan would still be the deadliest presence in the catacombs for kilometres in any direction.

The tight tunnels opened out into a cavernous space. Lifting Chrysaor higher, the Chief Librarian allowed more of his potential to flood the unnatural blade of the weapon, throwing light up at the cave ceiling. Something colossal and twisted through with corrosion and stalactitular icicles formed the top of the cavern: some huge structure that had descended through the hive interior during some forgotten, cataclysmic collapse. Irregular columns of resistant-gauge rockcrete and strata structural supports held up the roof at precarious angles. This accidental architecture had allowed the abnormality of the open space to exist below and during the daily thaw had created, drop by drop, the frozen chemical lake that steamed beneath it.

A primitive walkway of scavenged plasteel, rock-ice and girders crossed the vast space and, as the Space Marines made their tentative crossing, Navarre’s warplight spooked a flock of gliding netherworms. Uncoiling themselves from their icicle bases they flattened their bodies and slithered through the air, angling the drag of their serpentine descent down past the Space Marines and at the crags and ledges of the cavern where they would make a fresh ascent. As the flock of black worms spiralled by, one crossed Stellan’s path. The novice struck out with his gauntlet in disgust but the thing latched onto him with its unparalleled prehensility. It weaved its way up through his armoured digits and corkscrewed up his thrashing arm at his helmetless face.

Light flashed before the Lexicanum’s eyes. Just as the netherworm retracted its fleshy collar and prepared to sink its venomous beak hooks into the Astartes’ young face, Navarre clipped the horror in half with the blazing tip of Chrysaor. As the worm fell down the side of the walkway in two writhing pieces, Stellan mumbled his thanks.

‘Why didn’t you use your powers?’ the Chief Librarian boomed around the cavern.

‘It surprised me,’ was all the Lexicanum could manage.

‘You’ve been out of the depths mere moments and you’ve already forgotten its dangers,’ Navarre remonstrated gently. ‘What of the galaxy’s dangers? There’s a myriad of lethality waiting for you out there. Be mindful, my novice.’

‘Yes, master.’

‘Did it come to you again?’ Navarre asked pointedly.

‘Why do you ask, master?’

‘You seem, distracted: not yourself. Was your sleep disturbed?’

‘Yes, master.’

‘Your dreams?’

‘Yes, master.’

‘The empyreal realm seems a dark and distant place,’ Navarre told his apprentice sagely. ‘But it is everywhere. How do you think we can draw on it so? Its rawness feeds our power: the blessings our God-Emperor gave us and through which we give back in His name. We are not the only ones to draw from this wellspring of power and we need our faith and constant vigilance to shield us from the predations of these immaterial others.’

‘Yes, master.’

‘Behind a wall of mirrored-plas the warp hides, reflecting back to us our realities. In some places it’s thick; in others a mere wafer of truth separates us from its unnatural influence. Your dreams are one such window: a place where one may submerge one’s head in the Sea of Souls.’

‘Yes, master.’

‘Tell me, then.’

Stellan seemed uncomfortable, but as the two Space Marines continued their careful trudge across the cavern walkway, the novice unburdened himself.

‘It called itself Ghidorquiel.’

‘You conversed with this thing of confusion and darkness?’

‘No, my master. It spoke only to me: in my cell.’

‘You said you were dreaming,’ Navarre reminded the novice.

‘Of being awake,’ Stellan informed him, ‘in my cell. It spoke. What I took to be lips moved but the voice was in my head.’

‘And what lies did this living lie tell you?’

‘A host of obscenities, my lord,’ Stellan confirmed. ‘It spoke in languages unknown to me. Hissed and spat its impatience. It claimed my soul as its own. It said my weakness was the light in its darkness.’

‘This disturbed you.’

‘Of course,’ the Lexicanum admitted. ‘Its attentions disgust me. But this creature called out to me across the expanse of time and space. Am I marked? Am I afflicted?’

‘No more than you ever were,’ Navarre reassured the novice. ‘Stellan, all those who bear the burden of powers manifest – the Emperor’s sacred gift – of which he was gifted himself – dream themselves face to face with the daemonscape from time to time. Entities trawl the warp for souls to torment for their wretched entertainment. Our years of training and the mental fortitude that comes of being the Emperor’s chosen protects us from their direct influence. The unbound, the warp-rampant and the witch are all easy prey for such beasts and through them the daemon worms its way into our world. Thank the primarch we need face such things for real with blessed infrequency.’

‘Yes, my lord,’ Stellan agreed.

‘The warp sometimes calls to us: demands our attention. It’s why we did not return to the Slaughterhorn with the others. Such a demand led me beyond the scope of the Lord Apothecary’s recruitment party and down into the frozen bowels of Carcharias. Here.’

Reaching the other side of the cavern, Navarre and Stellan stood on the far end of the walkway, where it led back into the rock face of pulverised masonry. Over the top of the tunnel opening was a single phrase in slap-dash white paint. It was all glyph symbols and runic consonants of ancient Carcharian.

‘It’s recent,’ Navarre said half to himself. Stellan simply stared at the oddness of the lettering. ‘Yet its meaning is very old. A phrase that predates the hives, at least. It means, “From the single flake of snow – the avalanche”.’

Venturing into the tunnel with force sword held high, Navarre was struck by the patterns on the walls. Graffiti was endemic to the underhive: it was not mere defacement or criminal damage. In the ganglands above it advertised the presence of dangerous individuals and marked the jealously guarded territories of House-sponsored outfits, organisations and posses. It covered every empty space: the walls, the floor and ceiling, and was simply part of the underworld’s texture. Below that, the graffiti was no less pervasive or lacking in purpose. Tribal totems and primitive paintings performed much the same purpose for the barbarians of the catacombs. Handprints in blood; primordial representations of subterranean mega-vermin in campfire charcoal; symbolic warnings splashed across walls in the phosphorescent, radioactive chemicals that leaked down from the industrial sectors above. The Carcharian savages that haunted the catacombs had little use for words, yet this was all Navarre could see.

The Chief Librarian had been drawn to this place, deep under Hive Niveous, by the stink of psychic intrusion. Emanations. Something large and invasive: something that had wormed its way through the very core of the Carcharian capital. The ghostly glow of Chrysaor revealed it to Navarre in all its mesmerising glory. Graffiti upon graffiti, primitive paintings upon symbols upon markings upon blood splatter. Words. The same words, over and over again, in all orientations, spelt out in letters created in the layered spaces of the hive cacography. Repetitions that ran for kilometres through the arterial maze of tunnels. Like a chant or incantation in ancient Carcharian: they blazed with psychic significance to the Chief Librarian, where to the eyes of the ordinary and untouched, among the background scrawl of the hive underworld, they would not appear to be there at all.

‘Stellan! You must see this,’ Navarre murmured as he advanced down the winding passage. The Librarian continued: ‘Psycho-sensitive words, spelt out on the walls, a conditioned instruction of some kind, imprinting itself on the minds of the underhivers. Stellan: we must get word back to the Slaughterhorn – to Fabian – to the Chapter Master. The recruits could be compromised…’

The Chief Librarian turned to find that his novice wasn’t there. Marching back up the passage in the halo of his shimmering force weapon, Navarre found the Lexicanum still standing on the cavern walkway, staring up at the wall above the tunnel entrance with a terrible blankness. ‘Stellan? Stellan, talk to me.’

At first Navarre thought that one of the deadly gliding worms had got him, infecting the young Space Marine with its toxin. The reality was much worse. Following the novice’s line of sight, Navarre settled on the white painted scrawl above the tunnel. The ancient insistence, ‘From the single flake of snow – the avalanche’ in fresh paint. Looking back at the Lexicanum, Navarre came to realise that his own novice had succumbed to the psycho-sensitive indoctrination of his recruiting grounds. All the wordsmith had needed was to introduce his subjects to the trigger. A phrase they were unlikely to come across anywhere else. The timing intentional; the brainwashing complete.

Stellan dribbled. He tried to mumble the words on the wall. Then he tried to get his palsied mouth around his master’s name. He failed. The young Space Marine’s mind was no longer his own. He belonged to someone else: to the will of the wordsmith – whoever they were. And not only the novice: countless other recruits over the years, for whom indoctrination hid in the very fabric of their worlds and now in the backs of their afflicted minds. All ready to be activated at a single phrase.

Navarre readied himself. Opened his being to the warp’s dark promise. Allowed its fire to burn within. Slipping Chrysaen from its chest scabbard, the Chief Librarian held both force blades out in front of him. Each master-crafted gladius smoked with immaterial vengeance.

For Stellan, the dangers were much more immediate than brainwashing. Stripped of his years of training and the mental fortitude that shielded an Astartes Librarian from the dangers of the warp, Stellan succumbed to the monster stalking his soul.

Something like shock took the Crimson Consul’s face hostage. The novice looked like he had been seized from below. Somehow, horribly, he had. The Librarian’s head suddenly disappeared down into the trunk of his blue and gold power armour. An oily, green ichor erupted from the neck of the suit.

‘Ghidorquiel…’ Navarre spat. The Chief Librarian thrust himself at the quivering suit of armour, spearing his Lexicanum through the chest with Chrysaor. The stink of warp-corruption poured from the adamantium shell and stung the psyker’s nostrils. Spinning and kicking the body back along the treacherous walkway, Navarre’s blades trailed ethereal afterglow as they arced and cleaved through the sacred suit.

Howling fury at the materialising beast within the armour, the Chief Librarian unleashed a blast wave of raw warp energy from his chest that lit up the cavern interior and hit the suit like the God-Emperor’s own fist.

The suit tumbled backwards, wrenching and cracking along the walkway until it came to rest, a broken-backed heap. Even then, the armour continued to quiver and snap, rearranging the splintered ceramite plating and moulding itself into something new. On the walkway, Navarre came to behold an adamantium shell, like that of a mollusc, from which slithered an explosion of tentacles. Navarre ran full speed at the daemon while appendages shot for him like guided missiles. Twisting this way and that, but without sacrificing any of his rage-fuelled speed, the Chief Librarian slashed at the beast, his blinding blades shearing off tentacular length and the warp-dribbling tips of the monster feelers.

As the psyker closed with the daemon nautiloid, the warp beast shot its appendages into the fragile walkway’s architecture. Hugging the snapping struts and supports to it, the creature demolished the structure beneath the Crimson Consul’s feet.

Navarre plummeted through the cavern space before smashing down through the frozen surface of the chemical lake below. The industrial waste plunge immediately went to work on the blue and gold of the Librarian’s armour and blistered the psyker’s exposed and freezing flesh. Navarre’s force blades glowed spectroscopic eeriness under the surface and it took precious moments for the Space Marine to orientate himself and kick for the surface. As his steaming head broke from the frozen acid depths of the lake, Navarre’s burn-blurry eyes saw the rest of the walkway collapsing towards him. Ghidorquiel had reached for the cavern wall and, pulling with its unnatural might, had toppled the remainder of the structure.

Again Navarre was hammered to the darkness of the lake bottom, sinking wreckage raining all about the dazed psyker. Somewhere in the chaos Chrysaen slipped from Navarre’s grip. Vaulting upwards, the Space Marine hit the thick ice of the lake surface further across. Clawing uselessly with his gauntlet, skin aflame and armour freezing up, Navarre stared through the ice and saw something slither overhead. Roaring pain and frustration into the chemical darkness, the Chief Librarian thrust Chrysaor through the frozen effluence. Warpflame bled from the blade and across the ice, rapidly melting the crust of the acid bath and allowing the Crimson Consul a moment to suck in a foetid breath and drag himself up the shoreline of shattered masonry.

Ghidorquiel was there, launching tentacles at the psyker. Hairless and with flesh melting from his skull the Librarian mindlessly slashed the appendages to pieces. All the Space Marine wanted was the daemon. The thing dragged its obscene adamantium shell sluggishly away from the lake and the enraged Astartes. Navarre bounded up and off a heap of walkway wreckage, dodging the creature’s remaining tentacles and landing on ceramite. Drawing on everything he had, the Chief Librarian became a conduit of the warp. The raw, scalding essence of immaterial energy poured from his being and down through the descending tip of his force sword. Chrysaor slammed through the twisted shell of Stellan’s armour and buried itself in the daemon’s core. Like a lightning rod, the gladius roasted the beast from the inside out.

Armour steamed. Tentacles dropped and trembled to stillness. The daemon caught light. Leaving the force blade in the monstrous body, Navarre stumbled down from the creature and crashed to the cavern floor himself. The psyker was spent: in every way conceivable. He could do little more than lie there in his own palsy, staring at the daemon corpse lit by Chrysaor’s still gleaming blade. The slack, horrible face of the creature had slipped down out of the malformed armour shell: the same horrific face that the novice Stellan had confronted in his dreams.

Looking up into the inky, cavern blackness, Navarre wrangled with the reality that somehow he had to get out of the catacombs and warn the Slaughterhorn of impending disaster. A slurp drew his face back to the creature; sickeningly it began to rumble with daemonic life and throttled laughter. Fresh tentacles erupted from its flaming sides and wrapped themselves around two of the crooked pillars of rockcrete and metal that were supporting the chamber ceiling and the underhive levels above.

All Navarre could do was watch the monster pull the columns towards its warp-scorched body and roar his frustration as the cavern ceiling quaked and thundered down towards him, with the weight of Hive Niveous behind it.

The Oratorium swarmed with armoured command staff and their attendants. Clarifications and communications shot back and forth across the chamber amongst a hololithic representation of the Slaughterhorn fortress-monastery that crackled disturbance every time an officer or Crimson Consuls serf walked through it.

‘They discovered nothing, my lord,’ Baldwin informed Artegall in mid-report. ‘No High Chaplain; no Scout squads; nothing. They’ve scoured the Dry-blind around the Pale Maidens. They’re requesting permission to bring the Thunderhawks back to base.’

‘What about Chief Librarian Navarre?’ Artegall called across the Oratorium.

‘Nothing, sir,’ Lord Apothecary Fabian confirmed. ‘On the vox or from the Librarium.’

‘Planetary Defence Force channels and on-scene Enforcers report seismic shift and hive tremors in the capital lower levels,’ the Master of the Forge reported, his huge servo-claw swinging about over the heads of the gathering.

‘What about the Crimson Tithe?’

‘Patching you through to Master Lambert now,’ Maximagne Ferro added, giving directions to a communications servitor. The hololithic representation of the Slaughterhorn disappeared and was replaced with the phantasmal static of a dead pict-feed that danced around the assembled Crimson Consuls.

‘What the hell is happening up there, Maximagne?’ Artegall demanded, but the Master of the Forge was working furiously on the servitor and the brass control station of the runeslab. The static disappeared before briefly being replaced by the Slaughterhorn and then a three-dimensional hololith of the Carcharian system. Artegall immediately picked out their system star and their icebound home world: numerous defence monitors and small frigates were stationed in high orbit. Circling Carcharias were the moons of De Vere, Thusa Major and Thusa Minor between which two strike cruisers sat at anchor. Most distant was Rubessa; the Oratorium could see the battle-barge Crimson Tithe beneath it. Approaching was Hecton Lambert’s strike cruiser, Anno Tenebris. The hololithic image of the Adeptus Astartes strike cruiser suddenly crackled and then disappeared.

The Oratorium fell to a deathly silence.

‘Master Maximagne…’ Artegall began. The Master of the Forge had a vox-headset to one ear.

‘Confirmed, my lord. The Anno Tenebris has been destroyed with all on board.’ The silence prevailed. ‘Sir, the Crimson Tithe fired upon her.’

The gathered Adeptus Astartes looked to their Chapter Master, who, like his compatriots, could not believe what he was hearing.

‘Master Faulks,’ Artegall began. ‘It seems you were correct. We are under attack. Status report: fortress-monastery.’

‘In lockdown as ordered, sir,’ the Master of Ordnance reported with grim pride. ‘All Crimson Consuls are prepped for combat. All sentry guns manned. Thunderhawks ready for launch on your order. Defence lasers powered to full.’

Captain Roderick presented himself to his Chapter Master: ‘My lord, the Seventh Company has fortified the Slaughterhorn at the Master of Ordnance’s instruction. Nothing will get through – you can be sure of that.’

‘Sir,’ Master Maximagne alerted the chamber: ‘Crimson Tithe is on the move, Carcharias bound, my lord.’

Artegall’s lip curled into a snarl. ‘Who the hell are they?’ he muttered to himself. ‘What about our remaining cruisers?’

Faulks stepped forwards indicating the cruisers at anchor between the hololithic moons of Thusa Major and Thusa Minor. ‘At full alert as I advised. The Caliburn and Honour of Hera could plot an intercept course and attempt an ambush…’

‘Out of the question,’ Artegall stopped Faulks. ‘Bring the strike cruisers in above the Slaughterhorn at low orbit. I want our defence lasers to have their backs.’

‘Yes, my master,’ Faulks obeyed.

‘Baldwin…’

‘Lord?’

‘Ready my weapons and armour.’

The Chamber Castellan nodded slowly, ‘It would be my honour, master.’ The Crimson Consuls watched the serf exit, knowing what this meant. Artegall was already standing at the head of the runeslab in a functional suit of crimson and cream power armour and his mantle. He was asking for the hallowed suit of artificer armour and master-crafted bolter that resided in the Chapter Master’s private armoury. The gleaming suit of crimson and gold upon which the honourable history of the Crimson Consuls Chapter was inscribed and inlaid in gemstone ripped from the frozen earth of Carcharias itself. The armour that past Masters had worn when leading the Chapter to war in its entirety: Aldebaran; the Fall of Volsungard; the Termagant Wars.

‘Narke.’

‘Master Artegall,’ the Slaughterhorn’s chief astropath replied from near the Oratorium doors.

‘Have you been successful in contacting the Third, Fifth or Eighth Companies?’

‘Captain Neath has not responded, lord,’ the blind Narke reported, clutching his staff.

Artegall and Talbot Faulks exchanged grim glances. Neath and the 8th Company were only two systems away hunting Black Legion Traitor Marine degenerates in the Sarcus Reaches.

‘And Captain Borachio?’

Artegall had received monthly astrotelepathic reports from Captain Albrecht Borachio stationed in the Damocles Gulf. Borachio had overseen the Crimson Consuls contribution to the Damocles Crusade in the form of the 3rd and 5th Companies and had present responsibility for bringing the Tau commander, O’Shovah, to battle in the Farsight Enclaves. Artegall and Borachio had served together in the same squad as battle-brothers and Borachio beyond Baldwin, was what the Chapter Master might have counted as the closest thing he had to a friend.

‘Three days ago, my lord,’ Narke returned. ‘You returned in kind, Master Artegall.’

‘Read back the message.’

The astropath’s knuckles whitened around his staff as he recalled the message: ‘… encountered a convoy of heavy cruisers out of Fi’Rios – a lesser sept, the Xenobiologis assure me, attempting to contact Commander Farsight. We took a trailing vessel with little difficulty but at the loss of one Carcharian son: Crimson Consul Battle-Brother Theodoric of the First Squad: Fifth Company. I commend Brother Theodoric’s service to you and recommend his name be added to the Shrine of Hera in the Company Chapel as a posthumous recipient of the Iron Laurel…’

‘And the end?’ Artegall pushed.

‘An algebraic notation in three dimensions, my lord: Kn Ω iii – π iX (Z-) – Αα v.R (!?) 0-1.’

‘Coordinates? Battle manoeuvres?’ Talbot Faulks hypothesised.

‘Regicide notations,’ Artegall informed him, his mind elsewhere. For years, the Chapter Master and Albrecht Borachio had maintained a game of regicide across the stars, moves detailed back and forth with their astropathic communiqués. Each had a board and pieces upon which the same game had been played out; Artegall’s was an ancient set carved from lacquered megafelis sabres on a burnished bronze board. Artegall moved the pieces in his mind, recalling the board as it was set up on a rostra by his throne in the Chancelorium. Borachio had beaten him: ‘Blind Man’s Mate…’ the Chapter Master mouthed.

‘Excuse me, my lord?’ Narke asked.

‘No disrespect intended,’ Artegall told the astropath. ‘It’s a form of victory in regicide, so called because you do not see it coming.’

The corridor outside the Oratorium suddenly echoed with the sharp crack of bolter fire. Shocked glances between Artegall and his Astartes officers were swiftly replaced by the assumption of cover positions. The armoured forms took advantage of the runeslab and the walls either side of the Oratorium door.

‘That’s inside the perimeter,’ Faulks called in disbelief, slapping on his helmet.

‘Well inside,’ Artegall agreed grimly. Many of the Space Marines had drawn either their bolt pistols or their gladius swords. Only Captain Roderick and the Oratorium sentry sergeants, Bohemond and Ravenscar, were equipped for full combat with bolters, spare ammunition and grenades.

With the muzzle of his squat Fornax-pattern bolt pistol resting on the slab, the Master of Ordnance brought up the hololithic representation of the Slaughterhorn once more. The fortress-monastery was a tessellation of flashing wings, towers, hangars and sections.

‘Impossible…’ Faulks mumbled.

‘The fortress-monastery is completely compromised,’ Master Maximagne informed the chamber, cycling through the vox-channels.

Bolt shells pounded the thick doors of the Oratorium. The 7th Company captain held a gauntleted finger to the vox-bead in his ear.

‘Roderick,’ Artegall called. ‘What’s happening?’

‘My men are being fired upon from the inside of the Slaughterhorn, my lord,’ the captain reported bleakly. ‘By fellow Astartes – by Crimson Consuls, Master Artegall!’

‘What has happened to us?’ the Chapter Master bawled in dire amazement.

‘Later, sir. We have to get you out of here,’ Faulks insisted.

‘What sections do we hold?’ Artegall demanded.

‘Elias, we have to go, now!’

‘Master Faulks, what do we hold?’

‘Sir, small groups of my men hold the Apothecarion and the north-east hangar,’ Roderick reported. ‘The Barbican, some Foundry sections and Cell Block Sigma.’

‘The Apothecarion?’ Fabian clarified.

‘The gene-seed,’ Artegall heard himself mutter.

‘The Command Tower is clear,’ Faulks announced, reading details off the hololith schematic of the monastery. Bolt-rounds tore through the metal of the Oratorium door and drummed into the runeslab column. The hololith promptly died. Ravenscar pushed Narke, the blind astropath, out of his way and poked the muzzle of his weapon through the rent in the door. He started plugging the corridor with ammunition-conserving boltfire.

‘We must get the Chapter Master to the Tactical Chancelorium,’ Faulks put to Roderick, Maximagne and the sentry sergeants.

‘No,’ Artegall barked back. ‘We must take back the Slaughterhorn.’

‘Which we can do best from your Tactical Chancelorium, my lord,’ Faulks insisted with strategic logic. ‘From there we have our own vox-relays, tactical feeds and your private armoury: it’s elevated for a Thunderhawk evacuation – it’s simply the most secure location in the fortress-monastery,’ Faulks told his master. ‘The best place from which to coordinate and rally our forces.’

‘When we determine who they are,’ Fabian added miserably. Artegall and the Master of Ordnance stared at one another.

‘Sir!’ Ravenscar called from the door. ‘Coming up on a reload.’

‘Agreed,’ Artegall told Faulks. ‘Captain Roderick shall accompany Master Maximagne and Lord Fabian to secure the Apothecarion; the gene-seed must be saved. Serfs with your masters. Sergeants Ravenscar and Bohemond, escort the Master of Ordnance and myself to the Tactical Chancelorium. Narke, you will accompany us. All understood?’

‘Yes, Chapter Master,’ the chorus came back.

‘Sergeant, on three,’ Artegall instructed. ‘One.’ Bohemond nodded and primed a pair of grenades from his belt. ‘Two.’ Faulks took position by the door stud. ‘Three’. Roderick nestled his bolter snug into his shoulder as Faulks activated the door mechanism.

As the door rolled open, Ravenscar pulled away and went about reloading his boltgun. Bohemond’s grenades were then followed by replacement suppression fire from Captain Roderick’s bolter.

The brief impression of crimson and cream armour working up the corridor was suddenly replaced with the thunder and flash of grenades. Roderick was swiftly joined by Bohemond and then Ravenscar, the three Space Marines maintaining a withering arc of fire. The command group filed out of the Oratorium with their Chapter serf attendants, the singular crash of their Fornax-pattern pistols joining in the cacophony.

With Roderick’s precision fire leading the Lord Apothecary and the Master of the Forge down a side passage, Bohemond slammed his shoulder through a stairwell door to lead the other group up onto the next level. The Crimson Consuls soon fell into the surgical-style battle rotation so beloved of Guilliman: battle-brother covering battle-brother; arc-pivoting and rapid advance suppression fire. Ravenscar and Bohemond orchestrated the tactical dance from the front, with Artegall’s pistol crashing support from behind and the Master of Ordnance covering the rear with his own, while half dragging the blind Narke behind him.

Advancing up through the stairwell, spiralling up through the storeys, the Astartes walked up into a storm of iron: armoured, renegade Crimson Consuls funnelled their firepower down at them from a gauntlet above. Unclipping a grenade, Ravenscar tossed it to his brother-sergeant. Bohemond then held the explosive, counting away the precious seconds before launching the thing directly up through the space between the spiral stair rails. The grenade detonated above, silencing the gunfire. A cream and crimson body fell down past the group in a shower of grit. The sergeants didn’t wait, however, bounding up the stairs and into the maelstrom above.

Dead Crimson Consuls lay mangled amongst the rail and rockcrete. One young Space Marine lay without his legs, his helmet half blasted from his face. As blood frothed between the Adeptus Astartes’ gritted teeth the Space Marine stared at the passing group. For Artegall it was too much. Crimson Consuls spilling each other’s sacred blood. Guilliman’s dream in tatters. He seized the grievously wounded Space Marine by his shattered breastplate and shook him violently.

‘What the hell are you doing, boy?’ Artegall roared, but there was no time. Scouts in light carapace armour were spilling from a doorway above, bouncing down one storey to the next on their boot tips, bathing the landings with scattershot from their shotguns. Bolt-rounds sailed past Faulks from below, where renegade Crimson Consuls had followed in the footsteps of their escape. The shells thudded into the wall above the kneeling Artegall and punched through the stumbling astropath, causing the Master of Ordnance to abandon his handicap and force back their assailants with blasts from a recovered bolter.

‘Through there!’ Faulks bawled above the bolt chatter, indicating the nearest door on the stairwell. Again Bohemond led with his shoulder, blasting through the door into a dormitory hall. The space was plain and provided living quarters for some of the Slaughterhorn’s Chapter serfs. Bright, white light was admitted from the icescape outside through towering arches of plain glass, each depicting a bleached scene from the Chapter’s illustrious history, picked out in lead strips.

Ravenscar handed Artegall his bolter and took a blood-splattered replacement from the stairwell for himself.

‘There’s a bondsman’s entrance to the Chancelorium through the dormitories,’ Artegall pointed, priming the bolter. Their advance along the window-lined hall had already been ensured by the bolt-riddled door being blasted off its hinges behind them.

‘Go!’ Faulks roared. The four Space Marines stormed along the open space towards the far end of the hall. The searing light from the windows was suddenly eclipsed, causing the Astrartes to turn as they ran. Drifting up alongside the wall, directed in on their position by the renegade Astartes, was the sinister outline of a Crimson Consuls Thunderhawk. As the monstrous aircraft hovered immediately outside, the heavy bolters adorning its carrier compartment unleashed their fury.

All the Space Marines could do was run as the great accomplishments of the Chapter shattered behind them. One by one the windows imploded with anti-personnel fire and fragmentation shells, the Thunderhawk gently gliding along the wall. The rampage caught up with Ravenscar who, lost in the maelstrom of smashed glass and lead, soaked up the heavy bolter’s punishment and in turn became a metal storm of pulped flesh and fragmented armour. At the next window, Artegall felt the whoosh of the heavy bolter rounds streak across his back. Detonating about him like tiny frag grenades, the rounds shredded through his pack and tore up the ceramite plating of his armoured suit. Falling through the shrapnel hurricane, Artegall tumbled to the floor before hitting the far wall.

Gauntlets were suddenly all over him, hauling the Chapter Master in through an open security bulkhead, before slamming the door on the chaos beyond.

By comparison the command tower was silent. Artegall squinted, dazed, through the darkness of the Chancelorium dungeon-antechamber, his power armour steaming and slick with blood, lubricant and hydraulic fluid.

As Artegall came back to his senses, he realised that he’d never seen this part of his fortress-monastery before; traditionally it only admitted Chapter serfs. Getting unsteadily to his feet he joined his battle-brothers in stepping up on the crimson swirl of the marble trapdoor platform. With Sergeant Bohemond and Master Faulks flanking him, the Chapter Master activated the rising floor section and the three Crimson Consuls ascended up through the floor of Artegall’s own Tactical Chancelorium.

‘Chapter Master, I’ll begin–’

Light and sound: simultaneous.

Bohemond and Faulks dropped as the backs of their heads came level with the yawning barrels of waiting bolters and their skulls were blasted through the front of their faceplates. Artegall span around but found that the bolters, all black paint and spiked barrels, were now pressed up against the crimson of his chest.

His assailants were Space Marines: Traitor Astartes. The galaxy’s arch-traitors: the Warmaster’s own – the Black Legion. Their cracked and filthy power armour was a dusty black, edged with gargoylesque details of dull bronze. Their helmets were barbed and leering and their torsos a tangle of chains and skulls. With the smoking muzzle of the first still resting against him, the second disarmed the grim Chapter Master, removing his bolter and slipping the bolt pistol and gladius from his belt. Weaponless, he was motioned round.

Before him stood two Black Legion officers. The senior was a wild-eyed captain with teeth filed to sharp points and a flea-infested wolf pelt hanging from his spiked armour. The other was an Apothecary whose once-white armour was now streaked with blood and rust and whose face was shrunken and soulless like a zombie.

‘At least do me the honour of knowing who I am addressing, traitor filth,’ the Chapter Master rumbled.

This, the Black Legion captain seemed to find amusing.

‘This is Lord Vladivoss of the Black Legion and his Apothecary Szekle,’ a voice bounced around the vaulted roof of the Chancelorium, but it came from neither Chaos Marine. The Black Legion Space Marines parted to reveal the voice’s owner, sitting in Artegall’s own bone command throne. His armour gleamed a sickening mazarine, embossed with the necks of green serpents that entwined his limbs and whose heads clustered on his chest plate in the fashion of a hydra. The unmistakable iconography of the Alpha Legion. The Space Marine sat thumbing casually through the pages of the Codex Astartes on the Chapter Master’s lectern.

‘I don’t reason that there’s any point in asking you that question, renegade,’ Artegall snarled.

The copper-skinned giant pushed the anti-gravitic lectern to one side, stood and smiled: ‘I am Alpharius.’

A grim chuckle surfaced in Artegall. He hawked and spat blood at the Alpha Legionnaire’s feet.

‘That’s what I think of that, Alpha,’ the Chapter Master told him. ‘Come on, I want to congratulate you on your trademark planning and perfect execution: Alpharius is but a ghost. My Lord Guilliman ended the scourge – as I will end you, monster.’

The Legionnaire’s smile never faltered, even in the face of Artegall’s threats and insults. It grew as the Space Marine came to a private decision.

“I am Captain Quetzal Carthach, Crimson Consul,’ the Alpha Legion Space Marine told him, ‘and I have come to accept your unconditional surrender.’

‘The only unconditional thing you’ll get from me, Captain Carthach, is my unending revulsion and hatred.’

‘You talk of ends, Chapter Master,’ the Legionnaire said calmly. ‘Has Guilliman blinded you so that you cannot see your own. The end of your Chapter. The end of your living custodianship, your shred of that sanctimonious bastard’s seed. I wanted to come here and meet you. So you could go to your grave knowing that it was the Alpha Legion that had beaten you; the Alpha Legion who are eradicating Guilliman’s legacy one thousand of his sons at a time; the Alpha Legion who are not only superior strategists but also superior Space Marines.’

Artegall’s lips curled with cold fury.

‘Never...’

‘Perhaps, Chapter Master, you think there’s a chance for your seed to survive: for future sons of Carcharias to avenge you?’ The Alpha Legion giant sat back down in Artegall’s throne. ‘The Tenth was mine before you even recruited them – as was the Ninth Company before them: you must know that now. I lent you their minds but not their true allegiance: a simple phrase was all that was needed to bring them back to the Alpha Legion fold. The Second and Fourth were easy: that was a mere administrative error, holding the Celebrants over at Nedicta Secundus and drawing the Crimson Consuls to the waiting xenos deathtrap that was Phaethon IV.’

Artegall listened to the Alpha Legionnaire honour himself with the deaths of his Crimson Consul brothers. Listened, while the Black Legion Space Marine looked down the spiked muzzle of his bolter at the back of the Chapter Master’s head.

‘The Seventh fell fittingly at the hands of their brothers, foolishly defending your colourfully-named fortress-monastery from a threat that was within rather than without. The Eighth, well, Captain Vladivoss took care of those in the Sarcus Reaches – and now the good captain has earned his prize. Szekle,’ the Alpha Legion Space Marine addressed the zombified Chaos Space Marine. ‘The Apothecarion is now in our hands. You may help yourself to the Crimson Consuls’ remaining stocks of gene-seed. Feel free to extract progenoids from loyalists who fought in our name. Fear not, they will not obstruct you. In fact, the completion of the procedure is their signal to turn their weapons on themselves. Captain Vladivoss, you may then return to Lord Abaddon with my respects and your prize – to help replenish the Black Legion’s depleted numbers in the Eye of Terror.’

Vladivoss bowed, while Szekle fidgeted with dead-eyed anticipation.

‘Oh, and captain,’ Carthach instructed as Artegall was pushed forwards towards the throne, ‘leave one Legionnaire, please.’

With Captain Vladivoss, his depraved Apothecary and their Chaos Space Marine sentry descending through the trapdoor on the marble platform with Bohemond and Faulk’s bodies, Carthach came to regard the Chapter Master once again.

‘The Revenant Rex was pure genius. That I even admit to myself. What I couldn’t have hoped for was the deployment of your First Company Terminator veterans. That made matters considerably easier down the line. You should receive some credit for that, Chapter Master Artegall,’ Carthach grinned nastily.

A rumble like distant thunder rolled through the floor beneath Artegall’s feet. Carthach seemed suddenly excited. ‘Do you know what that is?’ he asked. The monster didn’t wait for an answer. Instead he activated the controls in the bone armrest of Artegall’s throne. The vaulted ceiling of the Tactical Chancelorium – which formed the pinnacle of the Command Tower – began to turn and unscrew, revealing a circular aperture in the roof that grew with the corkscrew motion of the Tower top.

The Alpha Legionnaire shook his head in what could have been mock disappointment.

‘Missed it: that was your Slaughterhorn’s defence lasers destroying the strike cruisers you ordered back under their protection. Poetic. Or perhaps just tactically predictable. Ah, now look at this.’

Carthach pointed at the sky and with the Chaos Space Marine’s bolter muzzle still buried in the back of his skull, Artegall felt compelled to look up also. To savour the reassuring bleakness of his home world’s sky for what might be the last time.

‘There they are, see?’

Artegall watched a meteorite shower in the sky above: a lightshow of tiny flashes. ‘I brought theCrimson Tithe back to finish off any remaining frigates or destroyers. Don’t want surviving Crimson Consuls running to the Aurora Chapter with my strategies and secrets; the Auroras and their share of Guilliman’s seed may be my next target. Anyway, the beautiful spectacle you see before you is no ordinary celestial phenomenon. This is the Crimson Consuls Sixth Company coming home, expelled from the Crimson Tithe’s airlocks and falling to Carcharias. The battle-barge I need – another gift for the Warmaster. It has the facilities on board to safely transport your seed to the Eye of Terror, where it is sorely needed for future Black Crusades. Who knows, perhaps one of your line will have the honour of being the first to bring the Warmaster’s justice to Terra itself? In Black Legion armour and under a traitor’s banner, of course.’

Artegall quaked silent rage, the Chapter Master’s eyes dropping and fixing on a spot on the wall behind the throne.

‘I know what you’re thinking,’ Carthach informed him. ‘As I have all along, Crimson Consul. You’re pinning your hopes on Captain Borachio. Stationed in the Damocles Gulf with the Third and Fifth Companies… Did you find my reports convincing?’

Artegall’s eyes widened.

‘Captain Borachio and his men have been dead for two years, Elias.’

Artegall shook his head.

‘The Crimson Consuls are ended. I am Borachio,’ the Alpha revealed, soaking up the Chapter Master’s doom, ‘and Carthach … and Alpharius.’ The captain bent down to execute the final, astrotelepathically communicated move on Artegall’s beautifully carved Regicide board. Blind Man’s Mate.

Artegall’s legs faltered. As the Crimson Consul fell to his knees before Quetzal Carthach and the throne, Artegall mouthed a disbelieving, ‘Why?’

‘Because we play the Long Game, Elias…’ the Alpha Legionnaire told him.

Artegall hoped that the Black Legion’s attention span didn’t extend half as far as their Alpha Legion compatriots. The Space Marine threw his head back, cutting his scalp against the bolter’s muzzle. The weapon smacked the Chaos Space Marine in the throat – the Black Legion savage still staring up into the sky, watching the Crimson Consuls burn in the upper atmosphere.

Artegall surged away from the stunned Chaos Space Marine and directly at Carthach. The Alpha Legion Marine snarled at the sudden, suicidal surprise of it all, snatching for his pistol.

Artegall awkwardly changed direction, throwing himself around the other side of the throne. The Black Legion Space Marine’s bolter fire followed him, mauling the throne and driving the alarmed Carthach even further back. Artegall sprinted for the wall, stopping and feeling for the featureless trigger that activated the door of the Chapter Master’s private armoury. As the Chaos Space Marine’s bolter chewed up the Chancelorium wall, Artegall activated the trigger and slid the hidden door to one side. He felt hot agony as the Chaos Space Marine’s bolter found its mark and two rounds crashed through his ruined armour.

Returned to his knees, the Chapter Master fell in through the darkness of the private armoury and slid the reinforced door shut from the inside. In the disappearing crack of light between the door and wall, Artegall caught sight of Quetzal Carthach’s face once more dissolve into a wolfish grin.

Throwing himself across the darkness of the armoury floor, the felled Crimson Consul heaved himself arm over agonising arm through the presentation racks of artificer armour: racks from which serfs would ordinarily select the individual plates and adornments and dress the Chapter Master at his bequest. Artegall didn’t have time for such extravagance. Crawling for the rear of the armoury, he searched for the only item that could bring him peace. The only item seemingly designed for the single purpose of ending Quetzal Carthach, the deadliest in the Chapter’s long history of deadly enemies. Artegall’s master-crafted boltgun.

Reaching for the exquisite weapon, its crimson-painted adamantium finished in gold and decorated with gemstones from Carcharias’s rich depths, Artegall faltered. The bolt-rounds had done their worst and the Chapter Master’s fingers failed to reach the boltgun in its cradle. Suddenly there was sound and movement in the darkness. The hydraulic sigh of bionic appendages thumping into the cold marble with every step.

‘Baldwin!’ Artegall cried out. ‘My weapon, Baldwin… the boltgun.’

The Chamber Castellan slipped the beautiful bolter from its cradle and stomped around to his master. ‘Thank the primarch you’re here,’ Artegall blurted.

In the oily blackness of the private armoury, the Chapter Master heard the thunk of the priming mechanism. Artegall tensed and then fell limp. He wasn’t being handed the weapon: it was being pointed at him through the gloom. Whatever had possessed the minds of his Neophyte recruits in the Carcharian underhive had also had time to worm its way into the Chamber Castellan, whose responsibility it was to accompany the recruitment parties on their expeditions. Without the training or spiritual fortitude of an Astartes, Baldwin’s mind had been vulnerable. He had become a Regicide piece on a galactic board, making his small but significant move, guided by an unknown hand. Artegall was suddenly glad of the darkness. Glad that he couldn’t see the mask of Baldwin’s kindly face frozen in murderous blankness.

Closing his eyes, Elias Artegall, Chapter Master and last of the Crimson Consuls, wished the game to end.