Warhammer 40k Wiki
Warhammer 40k Wiki

"Let history mark my words well, for I care nothing about who sits proud on the Throne of Terra when the last day dawns. Horus is a fine commander, but that's the limit of my admiration for that arrogant, preening bastard. I joined his rebellion because I can tolerate him easier than I can endure the abomination that names himself Master of Mankind. You want the truth of my life and death? I am Angron, the Eater of Worlds, and I am already dead. I died over a hundred years ago, in the mountains north of the city that enslaved me. I died after Desh'ea."

Primarch Angron talking to his brother Lorgar

The Shadow Crusade was a joint military campaign conducted during the opening days of the Horus Heresy into the Realm of Ultramar by the Primarchs Lorgar Aurelian of the Word Bearers Legion and Angron of the World Eaters Legion.

The two Traitor Legions proceeded to lay waste to the Ultramarines Legion's stellar empire in the Eastern Fringe of the galaxy, rapidly destroying twenty-six worlds in quick succession.

This campaign ensured the success of the sorcerous Ruinstorm that had been conjured by the Word Bearers during the Battle of Calth, which would ultimately divide the galaxy in two, effectively cutting Ultramar off from the rest of the Imperium of Man.

The Traitors' campaign also resulted in the death of the entire population of Angron's homeworld of Nuceria. However, the Shadow Crusade set the World Eaters Legion irreversibly onto the path of damnation in service to Chaos and also led to the apotheosis of Angron into a Daemon Prince of the Blood God Khorne.


Opening Moves

During the opening days of the Horus Heresy, Lorgar had ordered his two most trusted advisors, First Chaplain Erebus and the Dark Apostle Kor Phaeron, to unleash their wrath against the Realm of Ultramar.

This was done in retaliation for the humilation the XVIIth Legion had been forced to endure when they were made to kneel in disgrace before the Emperor of Mankind and Roboute Guilliman and his Ultramarines on the world of Khur by the XIIIth Legion at the Emperor's orders during the Great Crusade some 43 standard years before the start of the Horus Heresy.

The Word Bearers had obtained knowledge that the pride of Guilliman's fleet, the ancient battleships built in the shipyards of distant Mars, were laying quiescent at anchor and at their most vulnerable, and the need to maintain the fiction that the entire Word Bearers Legion was arriving in the Veridia System, dictated the inclusion of the greatest portion of the Word Bearers fleet strength at Calth.

Yet in order to fully cripple Ultramar and the XIIIth Legion, it would not have been enough for the Word Bearers and their allies to destroy Calth and those Legionaries and other military assets gathered there.

They would also need to strike at the other strongholds scattered throughout the Five Hundred Worlds, to shatter both the capability of the remaining warriors of the Ultramarines to rebuild as well as their will to fight. To this end the great Traitor armada was split apart, dividing into at least half a dozen fleets.

Simultaneously with the Word Bearers' assault on Calth, Lorgar and the more reliable Word Bearers under his command launched a second offensive, a joint so-called "Shadow Crusade" with his brother Angron's World Eaters Legion into the rest of the Realm of Ultramar.

This large Traitor armada, comprising the fewest ships of the line, but including the world-killing firepower of the Trisagion and the Blessed Lady, as well as both the Fidelitas Lex and the Conqueror and the Primarchs who commanded them, set course for the War World of Armatura to burn the beating heart from the perfect empire of Guilliman.

The Word Bearers captain Zadkiel, finally arriving at Ultramar with the Furious Abyss, began a futile assault on Macragge, while Erebus and Kor Phaeron took the main force of the Word Bearers fleet to Calth at the head of nearly seventy capital ships and numerous squadrons of escort craft.

This fleet was led by Erebus' Destiny's Hand and the squat Battle Barge of Kor Phaeron, still broadcasting her old identity as the Raptorous Rex instead of her newer designation, the Infidus Imperator.

The attack on Calth was to be the opening volley in Lorgar's campaign, a symbolic bloodying of the knife and cruel retort to the shame Guilliman and his warriors had wrought years before on Monarchia.

The Word Bearers proceeded to achieve a monumental victory over their hated foes at the Battle of Calth which ensued. The Ultramarines Legion was badly crippled after this campaign and no longer presented a viable threat to Horus' plan to drive on Terra.

Erebus had managed to complete his blasphemous ritual on Calth's surface, which summoned the beginnings of the Ruinstorm to the galaxy's Eastern Fringe -- a monstrous Warp Storm larger and more destructive than anything space-faring humanity had witnessed since the days of the Age of Strife.

The remainder of the armada, the few fleet strike craft amongst the Word Bearers and the vast array of knife-fast cutters, grappling barques and interdiction cruisers of the World Eaters fleet, were dispatched across Ultramar to bleed the Ultramarines fleet away, forcing them to respond to a series of small-scale raids and lightning-fast assaults.

These latter squadrons were tasked with causing the most bloodshed and destruction possible, and made no attempt to capture or hold territory. They did not strike only at those strategic targets an opponent might have expected them to take.

Instead, it was lightly defended agri-colonies and the industrial spires of worlds such as Espandor and Latona that would feel the Traitors' wrath in the bleak days to come.

This would be a crusade whose first and foremost aim was to spread terror and blood across the Five Hundred Worlds, to wring every last iota of suffering from the people of Ultramar, all to fuel the sorcerous schemes set in place by Lorgar himself and, where before he had restrained his blood-maddened brother, Angron was now to be unleashed.

The Shadow Crusade laid waste to the Five Hundred Worlds with reckless abandon in order to ensure the success of the Ruinstorm, which would ultimately split the void asunder, dividing the galaxy in two and rendering vast tracts of the Imperium impassable for potentially centuries, effectively cutting Ultramar off from the rest of the Imperium.

This prodigious Warp Storm was intended to deny needed reinforcements to the Loyalists as Horus drove on Terra in an attempt to overthrow the Emperor of Mankind. Nothing from Terra would get in to the region and nothing would get out. Not even an astropathic whisper would be able to pierce this storm of Warp energy bleeding into realspace.

Battle of Calth

It is unlikely that the true architect of the Calth Atrocity will ever be known, and weighed against the innumerable sins committed by both Lorgar and Horus, the attribution of this one offence is inconsequential.

What is known is that the earliest stages of the assault on Ultramar were laid down long before Horus arrived at the fateful worlds of Istvaan in the year 005.M31, with a series of orders issued under the seal of the Warmaster despatching a number of Legions to campaigns in the furthest reaches of the Imperium.

Of these, the Blood Angels were sent forth in their entirety to Signus, the Dark Angels to Tsagualsa and the Ultramarines were ordered to muster alongside the Word Bearers at Calth, both Legions to be deployed against the Ork hold of Ghaslakh.

Gathering at Saturn those of his Legion who had been embarked on crusades in distant parts of the galaxy, Roboute Guilliman would depart the Sol System mere solar months before news of Horus' rebellion reached the Emperor's ears.

The turbulent state of the Empyrean in those years would see the Ultramarines' main strength journey to Calth by a winding and obtuse trail which would also cloak them from all attempts by Terra to recall them or forewarn them of Horus' actions.

The Word Bearers, delayed by the slaughter at Istvaan, would not arrive at Calth until the majority of the XIIIth Legion had already gathered, travelling a path of blood and ashes of their creation.

Though the Ultramarines would eventually prove victorious, they would not be afforded the luxury of reaping the fruits of their victory. In one final callous act, the Word Bearers somehow, and through inexplicable means, poisoned the solar winds emanating from the Veridia star.

The surface of Calth, its atmosphere already grievously injured by the Word Bearers' bombardment, rapidly destabilised to the point that it soon became impossible for unprotected mortals to walk upon it.

The majority of the population was evacuated into the vast subterranean arcologies in an effort to provide some shelter, however tenuous, from the fell light of the Veridia star.

The second crisis brought to the Primarch's attention was at that time only partially understood, but already astro-telepathic messages were relaying desperate pleas for aid from all over the Five Hundred Worlds of Ultramar. The Traitors' assault on Calth was not an isolated event; other attacks were being reported across dozens of other star systems.

In a moment of stark clarity, Guilliman saw what the Word Bearers had intended at Calth -- they had planned the extinction of the Ultramarines so that the Traitors could reave unopposed across those stars under his protection. In this they had failed, for while the Ultramarines had suffered unprecedented losses, the XIIIth Legion had rallied and was yet a formidable force.

Guilliman's vengeance would be terrible indeed, and well-earned. But here the Primarch's counsellors set their final piece of ill news before him.

The Warp, which had been turbulent and capricious for the past standard year, now rose towards a storm of unprecedented fury. Worse, it closed in around the Veridian System and any vessels that did not leave within a few solar hours would be stranded there for many standard years.

The losses inflicted upon the Ultramarines' fleet assets at Calth were crippling and hamstrung any effort to prosecute a war beyond the bounds of Ultramar. Such was the Ultramarines' desperation, missions to salvage the hulks drifting in orbit above Calth were quickly authorised despite the death toll such missions exacted in the deadly radiation of the altered Veridia star.

Eventually, Guilliman took his leave of the once-bountiful world of Calth, the would-be jewel in the crown of Ultramar which had stood for so much that now could never be realised.

Before the Primarch ordered the fleet to depart, the Warp closing in all about it, he swore to return to Calth and to deliver it from the Traitors. It would be many Terran years and many battles, across five hundred worlds and more, before that promise could be delivered upon.

But it would be delivered upon, for Roboute Guilliman, Primarch of the XIIIth Legion and Master of the Five Hundred Worlds of Ultramar, had sworn it. Ultramar would endure.

Sector-Wide Invasion

With almost half of the Ultramarines Legion killed or put out of action after the Battle of Calth, and interstellar communications and travel disrupted by Lorgar's Ruinstorm, each planet of the Ultramarran realm was left to fend for itself.

The Ultramarines 19th, 24th and 25th Chapters, spared the horrors of Calth, were spread throughout the myriad worlds of Ultramar. However, they faced the full might of the World Eaters Legion as well as the remaining half of the Word Bearers and their terrifying Abyss-class Battleships.

The Furious Abyss

Kor Phaeron's own plan was to strike at the heart of Ultramar and destroy its core worlds while Lorgar and the Primarch Angron's World Eaters Legion tore through its outer rim. His Abyss-class Battleship, the Furious Abyss, was unleashed to destroy Maccrage, the homeworld of the Ultramarines, while the bulk of the XIIIth Legion was stationed at Calth.

The giant battleship was to withstand the full barrage of Macragge's defence fleet as well as its planetary defences before entering high orbit and unleashing its deadly cargo of Virus Bombs.

It would then join a smaller fleet of Word Bearers vessels in laying waste to the remaining core worlds of Ultramar. Fortunately, a small strike force of Ultramarines and Space Wolves boarded the Furious Abyss and were able to destroy it from within at the cost of their own lives.

Without the support of the Furious Abyss, the Word Bearers' attack on Macragge and the core worlds of Ultramar ultimately failed.

Battle of Astagar

On some worlds such as Astagar, the sons of Guilliman were able to repel the invaders completely. There, a force of 600 Ultramarines led by Lucretius Corvo would find themselves beset by an invasion force several times their number.

Although Corvo only heard the true, appalling scale of what had happened at Calth later, by the time the enemy approached Astagar he was at least aware of the treachery. Corvo began the defence as soon as the Word Bearers and World Eaters translated in-system, and his erstwhile cousins were met with a wall of fire.

The Traitor force consisted of five battle cruisers and attendant support. The manner of the enemy's approach told Corvo they were intent on a ground battle, so he landed his own warriors on Astagar's surface and ordered his fleet to run out ahead of the enemy.

The resulting fleet battle cost the invaders five Traitor Imperial Army transports at minimal damage to the Ultramarine warships. When the Traitors commenced their orbital insertion over Eurythmia Civitas, the capital city of Astagar, it was empty but for six hundred Ultramarines and the seventy thousand men of the Astagarian Light Rangers.

Although the Loyalists were pushed back at first, Corvo and his officers quickly identified the heart of the Word Bearer's invasion force -- a daemon-possessed Warlord-class Titan. Luring it ahead of the main Traitor lines and pummeling it with concentrated Shadowsword fire, the Ultramarines obliterated the possessed Traitor Titan, effectively breaking the morale of the invading forces.

With a swift counterattack, the Loyalists quickly eliminating the remaining Traitors on the planet.

Percepton Campaign

At the world of Percepton Primus in Ultramar's Percepton System, the Word Bearers managed to cripple the Ultramarines' forces in 27 solar minutes, but the fight raged on for 163 Terran days.

The opening Traitor attack destroyed more than half of the Ultramarines' starships. On the surface of Percepton Primus, the fight was marked by armoured assaults, but soon broke down into hand-to-hand combat.

The Word Bearers bombarded the planet, attacking from the air with Thunderhawks and Stormbirds and from the ground with Rhinos, Land Raiders, Vindicators, Fellblades, and Typhons.

The Ultramarines, led by Decimus, Master of the 17th Chapter, attempted to fight back, but the battle went poorly with enemy Titans cutting down his warriors and all Vox communication disrupted by daemonic whispers.

The Loyalist Titans had long since been dispatched by the Traitors' orbital strikes, giving the invaders a large advantage in armour assets. Knowing the battle was lost, Decimus gave five Ultramarines who had been marked for censure a chance to redeem themselves by completing a special mission.

Despite the efforts of the Word Bearers, this team succeeded in establishing contact with a single Ultramarine cruiser, the Righteous Fury, that had miraculously managed to survive in high orbit and convinced its shipmistress to bombard the planet with Phosphex, killing Traitors and Loyalists alike on the surface. Though the censured Ultramarines were killed by pursuing Word Bearers, it proved too late for the invaders to stop the Loyalist bombardment.

At the same time, Chapter Master Decimus gathered all the surviving Ultramarines on Percepton Primus for a final stand. Thousands of Word Bearers faced them with Dreadnoughts and heavy tanks, but then the attack from orbit began.

Many Ultramarines believed the bombardment marked the arrival of Loyalist reinforcements, and Decimus felt shame that he had not told his warriors of what he intended as his final contingency to prevent Percepton from falling to the Traitors.

Decimus told his warriors the truth at that moment, that the planet could not be held, but that they would take the Traitors with them. In their final moments, Decimus rallied his Astartes, and they were filled with pride and anger as he called for a final charge into the Word Bearers' ranks as incendiary death swept across the planet, burning Traitor and Loyalist alike to ash.

Battle of Armatura

The main thrust of the Shadow Crusade, led directly by Lorgar and Angron, tore through over 100 Ultramaran worlds, laying them to waste before falling upon the War World of Armatura.

During the brutal assault, the Ultramarines managed to lure the enraged World Eaters into a trap as they assaulted the main quarter of the ruined capital city, collapsing buildings and burying many of the World Eaters and their Primarch Angron under tons of rubble.

The Primarch's twin Chainaxes, Gorefather and Gorechild were ruined, as they had lost their teeth when Angron utilised them to dig his way out from beneath tons of rubble. After Angron managed to crawl from his makeshift tomb, he discarded both axes, for they would never function again.

In the aftermath of the battle, Angron's Equerry Kharn found the discarded Gorechild and picked it up.

He knew he risked his Primarch's wrath by violating Angron's superstition that inherited weapons bring ill luck, a gladiatorial conceit taken from his homeworld of Nuceria, but he still had Gorechild repaired, and used the mighty weapon as his own from that day forward.

During this campaign of destruction, Lorgar realised that over the course of the Shadow Crusade, Angron's temperament and mental stability had steadily grown worse. The cybernetic neural implants known as the Butcher's Nails were killing Angron faster than Lorgar had originally imagined, faster than anyone had realised. The rate of degeneration had accelerated very quickly in the solar months after the Battle of Calth.

The truth was that the implants had never been designed for the peculiar genetics of a Primarch's brain. Angron's physiology was trying to heal the damage produced by the implants as the Nails bit deeper. To save his life, Lorgar convinced the lord of the World Eaters to go back to his homeworld of Nuceria.

The overlords of the gladiatorial games on that world who had first hammered the foul device into Angron's skull would know more about the implant's function than the Traitor Legions' savants and the Dark Mechanicum.

Lorgar promised that the two Primarchs would learn all that was known about the Nucerians' insidious cortical implant technology, and then they would burn that loathsome world until its surface was nothing but glass. In that way, Angron would finally claim the vengeance he pretended to no longer desire.

Whether Angron fought him, hated him or trusted him mattered little to Lorgar, who intended to drag Angron into the immortality that he deserved in service to the Dark Gods whether he wanted it or not.

Battle of Nuceria

Roboute Guilliman's Ultramarine retribution fleet, which had been tracking the rest of the Word Bearers Legion in the wake of the Battle of Calth, finally caught up to the Traitors upon Angron's homeworld of Nuceria, which the World Eaters Legion were preoccupied with wiping clean of all life in vengeance for the treatment the Nucerians had merited out a standard century before to Angron.

The XIIIth Legion's warship Courage Above All, Guilliman's temporary flagship, broke from the Warp at the system's edge, at the head of a large void armada consisting of 41 vessels.

The Ultramarines' armada looked wounded, cobbled together from separate fleets. It was not a dedicated interdiction war-fleet, but clearly a ragtag strike force, a lance thrust to the enemy's heart. Guilliman himself had done the best he could with limited resources.

The XIIIth Legion's cruisers and battleships ran abeam of the enemy fleet for repeated exchange of broadsides, offering targets too big and powerful to ignore, while the rest of the Ultramarines fleet used calculated Lance strikes from safer range.

The armada then divided its assault potential, doing its utmost to destroy Lorgar's flagship Fidelitas Lex, and attempted to take the World Eaters' flagship Conqueror in a boarding action.

But the Ultramarines' warships not only fought a void war, they also attempted to take the fight to the surface of Nuceria, for this attack was personal. The Ultramarines had come for revenge against Lorgar and the Word Bearers, just as they had pursued Kor Phaeron all the way to the Maelstrom on the other side of Ultramar.

Several Ultramarines warships attempted to make a run on Nuceria, haemorrhaging Drop Pods, landers and gunships, forcing planetfall by any means necessary.

The Ultramarines fleet swept over and against the Traitors like an insect horde. But the tenacious commander of the Conqueror, Lotara Sarrin, put up a difficult fight and destroyed a number of Ultramarines vessels that attempted to make a run for the surface.

Though the World Eaters' flagship transformed a number of the smaller vessels into flaming wreckage, the Ultramarines eventually punched through her tenacious defence and managed to land troops on the surface of Nuceria.

Meanwhile, the Fidelitas Lex was already a ruin, its armour pitted and cracked, its shields a memory. The cathedrals and spinal fortresses barnacling along its back were gone, laid waste by the Ultramarines' incendiary rage.

The XIIIth Legion's armada attacked in strafing runs and protracted exchanges of broadsides, trading fire with the superior warship and accepting their own casualties as the cost of bleeding the bigger vessel dry.

Each assault left the Lex weaker, firing fewer turrets and cannons, taking punishment on its increasingly fragile armour. But she fought on. Crawling with smaller ships, the Lex lashed back with its remaining Macrocannons, rolling in the light of its own burning hull.

Guilliman guided the battle from the command deck of Courage Above All, and had decided that the Lex would die first, killed in the death of a thousand cuts and swept from the game board, while the Conqueror would be boarded and killed from within.

In the course of the battle in Nucerian orbit, the Conqueror could not rise to its sister-ship's defence. Both Traitor Legion flagships fought alone, starved of support and suffering the endless attacks of the XIIIth Legion's ragged armada. Salvation Pods streamed from the Lex’s sides and underbelly, along with heavier Mechanicum craft and bulk landers.

With the Legionaries of the Word Bearers already on the surface, the ship's human population fled in the vessel's final minutes. And still the great vessel fought for its life -- rolling, turning, raging.

The Ultramarines cruisers that drifted past burned as badly as the warship they were killing. This void battle was a form of dirty fighting between warships, too close for the neat calculations of ranged battery fire. Instead, it was an up-close and personal slugfest.

The Ultramarines Battle Barge Armsman intercepted the Conqueror and came abeam, launching Assault Carriers and Boarding Torpedoes. While the World Eaters flagship was busy repelling the boarders, a number of smaller XIIIth Legion vessels slipped past her defences and launched Drop Pods, gunships and troop carriers.

The first Drop Pods hammered home on the planet's surface. Sealed doors unlocked and the first Ultramarines poured forth, Bolters raised, moving in perfect and well-trained unity. But the World Eaters were waiting for them.

Those not lost to the violent demands of the Butcher's Nails at once had the presence of mind to note that these Ultramarines were not the pristine cobalt-blue warriors they had previously faced on the War World of Armatura.

These Legionaries of the XIIIth wore cracked Power Armour, still scarred and burnwashed from some horrendous battle solar weeks or months before. These were hardened veterans of the Battle of Calth. They burned with a cold intensity to carry out the vengeance in their hearts, and were intent on getting to grips with the Word Bearers.

As was their way, the Ultramarines established footholds at defensible positions, clearing room for their reinforcements to land. For every position they held, another was overrun by the World Eaters in a storm of roaring axes, or lost to the Word Bearers' chanting, implacable advance.

The XIIth Legion crashed against the XIIIth in rabid packs, showing why other Imperial forces had feared to fight alongside them for many solar decades.

Uncontrolled, unbound, unrestrained, the World Eaters butchered their way through Ultramarine strongpoints, enslaved to the joy of battle because of the Butcher's Nails cortical implants sandwiched within the meat of their minds. The XVIIth Legion also met their Loyalist cousins, replacing ferocity with spite and hate.

The Ultramarines returned it in kind, hungry for vengeance against the vile Traitors who had defiled Calth and damaged its star. Word Bearers units marched, droning black hymns and chanting sermons from the Book of Lorgar, bearing corpse-strewn icons of befouled metal and bleached bones above their regiments.

As the fighting raged, the burning shell of the Fidelitas Lex cut through the clouds into the planet's atmosphere, shuddering on its way east, rolling ever downwards, achingly slow for something of such scale. The weight of the Lex's massive plasma engines dragged the stern down first, colliding with the Nucerian ocean's surface far from shore.

In the meantime, the demigod in gold and blue had finally found the object of his obsession amidst the clamour of war. Guilliman confronted Lorgar, possessing the advantage of two weapons, but Lorgar's Crozius gave him a reach his brother lacked. When they first met, there was no furious trading of frantic blows, nor were there any melodramatic speeches of vengeance declared.

The two Primarchs came together once, Power Fist against War Maul, and backed away from the resulting flare of repelling energy fields. Their warriors killed each other around them both, and neither Primarch spared their sons a glance. Lorgar flicked the clinging lightning from the head of his Crozius, shaking his head in slow denial.

Both Primarchs fought without heeding their warriors, their godlike movements an inconceivable blur even to the transhuman Space Marines fighting around them. None had ever imagined the heroes of this new age would take to the field against each other, nor could they have predicted the wellsprings of spite between them. Guilliman confronted Lorgar now for what his XVIIth Legion had done across the Five Hundred Worlds of Ultramar.

In his righteous anger the Ultramarines Primarch struck Lorgar with one of his fists, battering the Word Bearers Primarch's sternum. Lorgar repulsed him with a projected burst of sorcerous telekinesis, weak and wavering, but enough to send his brother staggering.

The Crozius followed, its power field trailing lightning as Lorgar hammered it into the side of Guilliman's head with the force of a cannonball. Both Primarchs faced each other beneath the grey sky of Nuceria, one bleeding internally, the other with half of his face lost to blood sheeting from a fractured skull.

As the two Primarchs were locked in their furious life-and-death struggle, they were oblivious to the destruction being wrought around them. Suddenly, Angron burst forth from the Ultramarines' ranks, his armour a shattered wreck, and both of his Chainswords spat gobbets of ceramite armour plating and scarlet gore.

Angron was plastered with the blood of the slain after hours in the crush of the front lines of intense combat. The World Eater launched himself at Guilliman with murderous hatred. The two Primarchs fell into a seamless, roaring duel where Lorgar and Guilliman had abandoned theirs. Guilliman found himself forced back by the storm of Angron's blows.

Angron Mourning

Coming home to Nuceria after a century, Angron visits the site of the Battle of Desh'elika Ridge to mourn his lost gladiator brothers and sisters.

After making planetfall on Nuceria, Angron had paid his respects to his fallen brothers and sisters amongst the Nucerian gladiators he had once fought beside, whose bones now lay exposed to the elements on the Desh'elika Ridge where they had died.

The painful memories of that day, long ago, were too much for the Primarch to bear. After paying a visit to the city-state of Desh'ea to see who ruled the Nucerian city-state that had once claimed to own him, he became enraged when he was told the tale of how he had fled at the Battle of Desh'elika Ridge, and the subsequent massacre of the rebel army in the mountains.

The rebels had died to a man in his absence. Enraged by the lies that had been told about him over the last Terran century, Angron ordered his Legion to kill everyone in the city. Then they were to kill everyone on the planet.

At the height of the final battle against the last city on Nuceria, Angron had seen Lorgar's confrontation with their wrathful brother Roboute Guilliman.

Guilliman and Lorgar had fought to a bloody stalemate. But Angron had seen Guilliman's assault upon Lorgar and intervened, facing the Lord of Ultramar in single combat.

On Angron's chest hung a bandolier of skulls taken from the mass grave at Desh'elika Ridge. Blood painted them as surely as it marked Angron. Even through the haze of pain created by the Butcher's Nails, that pleased him.

He wanted his former brothers and sisters, the Eaters of Cities, to taste blood once more. He had carried them with him across Nuceria, letting their empty eyes witness the razing of the high-rider cities.

As three Primarchs met in mortal combat, Guilliman landed a glancing blow on the World Eater, his fist pounding across Angron's breastplate. One of the skulls of Angron's fallen kinsman that hung from the chain worn across his breastplate was partially shattered and scattered across the ground.

Guilliman stepped back, his boot crushing a skull's remnants to powder. Angron saw it, and threw himself at his brother, his howl of wrath defying mortal origins, impossibly ripe in its anguish.

Angron Istvaan III

Angron, during the bloody slaughter of the Purge of Nuceria.

Lorgar saw it, too. The moment Guilliman's boot broke the skull, he felt the Warp boil behind the veil. The Bearer of the Word started chanting in a language never before spoken by any living being, his words in faultless harmony with Angron's cry of torment.

Lorgar enacted his dark plan to save his brother's life from the coming death brought by the Butcher's Nails, summoning the Ruinstorm to the world of Nuceria, tearing the sky open and unleashing a crimson torrent formed from the ghosts of a hundred murdered worlds, raining blood upon the battlefield.

Lorgar focused his concentration on the triumphant form of his mutilated brother, calling for the Neverborn, the entities humanity ignorantly called "daemons," to answer in kind. He locked Angron's muscles, setting fire to the synapses in his brain.

The first spasms wracked their way through Angron's sinews, turning his blood to quicksilver, then to lava and at last to holy fire. His cries of thwarted rage were tainted by an agony beyond comprehension.

His body started tearing itself apart, growing, rising. Perfecting, after a lifetime of broken torture. This was the moment of Angron's apotheosis into daemonhood.

The World Eaters Librarians, those few who had never received the deadly Butcher's Nails implants which were inimical to psykers, sensed the fey powers summoned by Lorgar from the Warp.

In an attempt to halt the Urizen's dark plans, the 19 remaining Librarians of the XIIth Legion harnessed their collective psychic powers to manifest a psychic entity known as "the Communion," the gestalt consciousness of 19 psychic minds.

In the midst of Lorgar's incantations, the Communion pulled the soul of the Primarch from his body. The two psychic entities confronted one another within the Warp, locked in a deadly contest of wills, each convinced that they were the one responsible for saving Angron. But ultimately, the Communion failed, for Lorgar was just as powerful in the Warp as he was in the material universe.

After Angron's metamorphosis into a Daemon Prince was complete, the newborn Daemon Primarch turned his attention to the Librarians. The creatures that had pained him for solar decades. The warriors that had made the Butcher's Nails sing and his brain bleed just for the sin of standing near them. Now they moved against his brother, hurling their foulness at Lorgar, who crouched one-handed and wounded, down on his knees.

Daemon Prince Angron by Alex Boyd

The newly transformed Daemon Primarch Angron of the World Eaters Legion.

The Daemon Primarch's rage killed the remaining Librarians, each of them tasting a different doom. When Angron had killed the last of the World Eaters Librarians, he had finally expunged his Legion of the weakness that had plagued his gene-sons since his reunification with them a century earlier.

The Librarius of the World Eaters, the last fragment of the original War Hounds within the XII Legion, was no more, a fact which greatly pleased the Blood God Khorne, who would not brook the existence of any psykers amongst his chosen servants.

Lorgar had offered up the XIIth Legion to the whims of the Blood God as his loyal champions. Now there would only be blood for them, an ocean of blood carried on a tide of eternal slaughter.

The gravely wounded Guilliman escaped from Nuceria, unable to face or even fully comprehend what both of his brothers had become through their corruption by the Ruinous Powers.

The World Eaters completed their purge of Nuceria until not one human life remained on the benighted world. Angron, now the very embodiment of the Blood God's Eight-Fold Path, shook the dust of the world from his feet and did not think of it again.

Lorgar believed that he had "saved" his brother. In his mind it was the only way, for he alone had sought to save Angron from the implants that were killing him by degrees. Only Lorgar had found a way to free Angron from an existence of unrivalled agony, and he alone had acted to save his tormented brother's life.

Now the Shadow Crusade could move on from Ultramar and rejoin Horus. The next target for the Traitors would be Terra itself.


  • The Horus Heresy - Book Five: Tempest (Forge World Series) by Alan Bligh, pp. 20-21, 145
  • Butcher's Nails (Audio Book) by Aaron Dembski-Bowden
  • Betrayer (Novel) by Aaron Dembski-Bowden
  • Chosen of Khorne (Audio Drama) by Anthony Reynolds
  • Know No Fear (Novel) by Dan Abnett
  • The Laurel of Defiance (Short Story) by Guy Haley
  • Battle for the Abyss (Novel) by Ben Counter
  • The Purge (Novella) by Anthony Reynolds
  • Dark Imperium (Novel) by Guy Haley, Ch. 3
Battles of the Horus Heresy
004-006.M31 First Battle of ProsperoIstvaan III AtrocityWar Within the WebwayBattle of the Somnus CitadelUnrest on CalibanSchism of MarsBattle of DiamatDrop Site MassacreBattle of the Rangda SystemFirst Battle of ParamarBattle of the Coronid DeepsSignus CampaignTreachery at Advex-MorsSiege of Cthonia
007-008.M31 Battle of PhallBattle of RavendelveBattle of the Alaxxes NebulaSiege of the Perfect FortressChondax CampaignSecond Battle of ProsperoFirst Siege of Hydra CordatusBattle of the Furious AbyssBattle of CalthBattle of ArmaturaShadow CrusadePercepton CampaignBattle of IydrisThramas CrusadeFall of Baztel IIIBattle of VannaheimSecond Battle of ParamarBattle of Constanix IISiege of Epsilon-Stranivar IXTreachery at Port MawManachean WarMezoan CampaignBattle of BodtBattle of DwellBattle of Molech
009-010.M31 Xana IncursionCarnage of MoroxSangraal CampaignLiberation of NuminalBattle of ArissakBattle of PerditusBattle of SothaScouring of Gilden's StarBattle of NyrconBattle of TallarnBattle of NocturneBattle of Pluto
011-014.M31 Lorin Alpha CampaignSubjugation of TyrinthMalagant ConflictBattle of the Kalium GateBattle of CatallusBattle of TralsakTarren SuppressionBalthor Sigma InterventionScouring of the Ollanz ClusterBattle of ZepathBattle of AnuariBattle of PyrrhanSecond Battle of DavinBattle of TrisolianBattle of YarantBattle of KradeBattle of DelugeBattle of Heta-GladiusBattle of the Aragna ChainBattle of KallethBattle of the Diavanos SystemBattle of DesperationBattle of Beta-GarmonDefence of RyzaBattle of ThagriaPassage of AngelsThassos IncidentBattle of Zhao-ArkhadSerpent's CoilSiege of BarbarusBattle of VezdellBurning of VrexorDawn of DesolationDeath of ChemosBattle of Luth TyreYdursk IncidentSolar WarRaid on LunaSiege of TerraGreat Scouring