Abaddon and the Black Crusades

To the scribes of the Imperium he is a byword for menace, and to the servants of the Dark Gods he is the mightiest mortal in the galaxy. Abaddon the Despoiler, Warmaster of Chaos and heir to the fallen Horus, has spent ten thousand years hammering at the walls of the Imperium. Thirteen times he has led a Black Crusade out of the Eye of Terror, and though Imperial propaganda dismisses the first twelve as failures, the truth is far more terrible: every one of them was a deliberate step toward the catastrophe that finally split the galaxy in two.

The First Captain's Inheritance

Abaddon was once the First Captain of the Luna Wolves, the favoured Legion that became the Sons of Horus, and he commanded the black-armoured Justaerin who were the deadliest killers of that host. When the Siege of Terra ended in Horus's death and the shattering of the traitor cause, the Legions fled into the Eye of Terror to fester and feud. For long years Abaddon brooded in that hell, refusing the crown of his dead master, until at last he rose and seized it. It is said he stood over the broken body of his primarch and made the choice that would define the next ten thousand years: not to worship Horus as a fallen god, but to surpass him as a living mortal. He reforged the shattered Sons of Horus into a new brotherhood, stripping away their old identity and painting their armour black in defiance and in mourning. Thus was born the Black Legion, and thus did the Chaos Space Marines find the warlord who would unite their fractious warbands as none had since Horus himself.

The Talon and the Blade

Two relics mark Abaddon as the Warmaster's true heir. The first is the Talon of Horus, the great clawed gauntlet once worn by the primarch in his final battle, recovered by Abaddon in a saga of blood and daemon-pacts that announced his ascension to all the powers of the warp. To take up the Talon was to claim not merely a weapon but the mantle of Warmaster itself, the rank Horus alone had held as the Emperor's right hand. The second is Drach'nyen, an ancient daemon sword said to embody the very first act of murder ever committed, a blade of such malevolence that it took an army to bind it and a will of iron to wield it. Armed with these, and favoured by every god of the Chaos Daemons at once, Abaddon became something no traitor had been in ten thousand years: a single champion whom the whole pantheon could agree to elevate.

The Pattern of the Black Crusades

A Black Crusade is not a raid. It is a great convulsion of the Eye of Terror, a marshalling of daemon and heretic and traitor Astartes into one vast host hurled at the Imperium under a single will. Abaddon launched the first within living memory of the Heresy, and across the millennia that followed he unleashed twelve more. Imperial historians, eager to reassure themselves, recorded each as a bloody nuisance ultimately repelled. They failed to ask what the Despoiler had actually come for. Again and again he seized a specific relic, murdered a specific enemy, or sacrificed a specific world to fuel some deeper design, then withdrew, his true objective achieved long before the defenders congratulated themselves on his defeat. In one crusade he tore a dread artefact from the vaults of a dead world; in another he cast down a shrine or martyred a champion whose loss bled the Imperium's spirit; in yet another he simply spent a fortune in lives to school his fractious followers in the art of marching as one host again. Each was a rehearsal, a gathering of pieces, a lesson committed to memory, so that when the day of the great blow finally came, nothing would be left to chance.

The Planet Killer and the Gothic War

The Twelfth Black Crusade, the Gothic War, revealed the scale of his ambition. At its heart sailed the Planet Killer, a titanic warship mounting a weapon capable of cracking a world open from orbit, a doomsday engine that turned whole systems to cinders. During that same war Abaddon seized several of the Blackstone Fortresses, colossal space stations of ancient alien manufacture, and bent their reality-warping power to his purpose. Though the Imperium eventually blunted the campaign, the Despoiler carried away weapons and knowledge that he would hoard for the day of his masterstroke. Nothing he did was ever truly wasted; every crusade fed the next.

The Thirteenth

That masterstroke came at last in the closing years of the 41st Millennium. The Thirteenth Black Crusade was the largest host raised in service to the Dark Gods since Horus marched on Terra, and it fell upon the fortress world of Cadia, the keystone that had barred the Eye of Terror for ten thousand years. This time Abaddon did not seek merely to break the planet's armies. He struck at the ancient pylons that held the warp at bay, and when the world would not yield he dragged a wounded Blackstone Fortress down from orbit and hurled it into Cadia's surface. The fall of Cadia shattered the pylons, ruptured the boundary between reality and the Immaterium, and unleashed the Great Rift, a galaxy-spanning wound that split the Imperium in two. Ten thousand years of patient labour had finally borne their poisonous fruit.

More Than Horus's Shadow

It is tempting, and comforting, to name Abaddon a failure, a lesser copy of Horus who battered himself against Cadia a dozen times before he got lucky. It is also wrong. Where the primarchs fell one by one to daemonhood and were consumed by their patron gods, Abaddon has remained mortal by choice, refusing to be transfigured into a spawn of any single power. He serves the principle of Chaos Undivided, and by belonging to none of Khorne, Tzeentch, Nurgle or Slaanesh alone he has made himself the champion of them all. From the Eye of Terror he wields the one thing the traitor cause had lacked for ten millennia: unity. In shattering Cadia and tearing open the heavens he accomplished what Horus never managed, and the darkest age in the Imperium's history is the true measure of his success. The Imperium counts its own survival as proof of the Despoiler's weakness; Abaddon counts a galaxy torn asunder and a road to Terra flung wide, and calls it patience rewarded.