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Fabius Bile

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Fabius Bile[4]

Fabius Bile is a Chaos Space Marine. Prior to the defeat of the Horus Heresy, he was a Lieutenant-Commander and Chief Apothecary of the Emperor's Children. He is now an infamous mad scientist, specializing in genetic manipulation and the creation of Enhanced Warriors.[4]



Fabius Bile was hold in high esteem by both Horus and Erebus for his skills[3a]. Omegon was told by Horus to give Bile the stolen Data from the Primach project[3a]. However the Data Omegon gave Bile was purposefully flawed, so that the traitors would waste manpower and resources, while it would be impossible to gain any benefit from it[3a].

Bile as he once was; Apothecary Fabius of the Emperor's Children[Needs Citation]

During the Heresy Fabius Bile took part in his legion's attack on Terra, although neither he or his Legion were actually involved in the siege of the Imperial Palace; instead, they attacked the general population. In the Legion's unrestrained fervour, millions of Earth's civilians were murdered. Bile used the opportunity to perform horrific experiments on captives. Human victims were rendered down to create special drugs which heightened the Legionnaires' feeling of ecstasy. It is possible that Earth served as the first example of Fabius Bile's subsequent atrocious experiments on entire planetary populations.[5]

Bile left Terra before the death of Horus, along with a retinue of altered followers. Now, he is a renegade even to his own Legion. Unlike the rest of the Emperor's Children, Bile does not follow Slaanesh, instead he devotes himself to science, and research into the creation of Space Marines.[1a] While he was still chief Apothecary of the Emperor's Children, he began to secretly experiment into ways of altering the gene-seed at the instruction of the Primarch Fulgrim with the intention of further perfecting the Legion. These experiments led to the first examples of Noise Marines among other things.[Needs Citation]

In the first few centuries following the Heresy, he traveled the galaxy offering his services to various planetary warlords or rebel leaders, in return for prisoners or ancient technical libra. Many of these ambitious overlords came to regret allowing Fabius's experimentation's on their people, as the results of his atrocities became apparent.[1a]

For a time, he was tutored in the dark arts of manipulating the flesh in the Tower of Flesh, a Haemonculi stronghold of the Coven of the Thirteen Scars.[2a] This eventually led to him tutoring his fellow Emperor's Children in these dark arts, which led to Bile coming into conflict with the Thirteen Scars. The Coven slaughtered those who Bile tutored, and surgically ensured that Fabius himself could never speak of what he had learned.[7]

He was nearly caught by the Salamanders chapter in the Arden system and has now set up base on one of the Eldar Crone Worlds within the Eye of Terror. He has forged alliances with the various Chaos Space Marine legions and promises to give them warriors to replenish their forces in return for protection.[Needs Citation]

Fabius styles himself 'Primogenitor', claiming he has unlocked the secrets in the creation of the Primarchs and the Space Marines.[1a] This is possibly due in part to the Raven Guard's research on the Primarch genetic code, which was stolen by Alpha Legion operatives.[3a] The pinnacle of his foul art is the "New Man", creatures who possess strength and intelligence superior to any human, as well as the worst traits of mankind. As Fabius leaves behind planets of corrupted human abominations, the Adeptus Astartes and the Inquisition strive to purge these creations, and are forced to destroy entire populations.[1a]

He has mastered the technique of cloning. Possibly related to this was the creation of a clone of Horus, which was destroyed by the Black Legion.[Needs Citation] He experiments on himself just as readily as on any of his victims, resulting in vast variations on his strength and other abilities. His experiments on others bring uncertain results. Sometimes the experiment is a success, creating psychotic killers, superhuman even in comparison to their corrupted Chaos brethren, sometimes the subject's metabolism disintegrates in the face of the stress, resulting in instant death.[Needs Citation]

Weapons and abilities

Fabius Bile Miniature[1b]

In addition to his already impressive augmented physiology, Bile is equipped with the Chirurgeon, a warp-tainted mechanical device attached to his spine. It pumps daemonically charged black ichor around his body giving him unnatural resilience. Spidery limbs tipped with vicious saws, blades and other twisted variations of medical devices extend over his shoulders, which act as both the tools of his experimentation and a means of attack.[Needs Citation]

He is also equipped with the Xyclos Needler, a gun that fires virulent poison darts and the daemon-forged Rod of Torment which when it strikes, is able to incapacitate almost any enemy with unbearable pain.[1a]


  • "If a man dedicates his life to good deeds and the welfare of others, he will die unthanked and unremembered. If he exercises his genius bringing misery and death to billions, his name will echo down through the millennia for a hundred lifetimes. Infamy is always more preferable to ignominy."[1a]
  • "Unlike you, whelp, I once walked the same ground as your Idol . I breathed the same air as him. And I tell you this, without lie or artifice. He never wanted to become what you have made him! He did not wish to be your god-thing. He abhorred such ideals! The slavery of your crippled, blind Imperium would sicken him, if he had eyes to see it."[6]


Fabius is a major antagonist in the third and fourth volumes of James Swallow's Blood Angels (Novel Series), and also appears peripherally in Swallow's short story The Returned and his Horus Heresy series novels The Flight of the Eisenstein and Fear to Tread.

At the 2012 Black Library Weekender, Swallow confided that he lobbied hard with Black Library and Games Workshop to let him "kill" Fabius at the end of Black Tide (Novel) (because of the sheer evil of Fabius's actions), but was refused.



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