Fabius Bile - Cloning Horus: Bile soon discovered that the shattered Traitor Legions making their home in the Eye of Terror in the 32nd Millennium had particular need of his skills. His augmented warriors and bio-magicks were useful indeed, and clones and slaves were put to good use on a hundred battlefields. Yet it was the skills Bile had learned as an Apothecary that were most precious to the Traitor Legions. Most of all, they needed Bile's ability to extract precious progenoid glands from the fallen in order to create new Chaos Space Marines.Without these skills, the Long War would slowly dwindle, and the fires that Horus had lit would go out forever. With so much influence at his behest, Fabius Bile negotiated a delicate bargain with the Traitor Legions, selling his secrets to each of them but refusing to aid one any more than any other. In this way, the Primogenitor ensures his position at the heart of a genetic web that spans across the Eye of Terror and beyond.Bile took up command of the remaining Emperor's Children and regrouped at Canticle City, the fortress of the Emperor's Children on the Daemon World of Harmony. Bile went about continuing his work from before the Heresy, attempting to unravel the secrets of the gene-seed and the Emperor's techniques in creating the primarchs. To that end, Bile continued to clone primarchs as he once had Ferrus Manus.At some point after the Heresy, the Primarch Horus' body was stolen from the Sons of Horus' Legion world of Maleum, for with its potent genetic information and biological secrets, it was a great prize indeed. In a sudden assault, the remnants of the debased Emperor's Children, having grown vastly in power after firmly cementing their terrible pacts with Slaanesh, easily smashed their way through the defences of the Daemon World of Maeleum and into the central chambers of the Sons of Horus' stronghold. They stole the body of the slain Primarch from the heart of its tomb and spirited it away, handing it over to the Primogenitor.Bile cloned Horus, much to the Sons of Horus' disgust. Bile thought that this would, amongst other things, curry the favour of Abaddon the Despoiler. Instead, Abaddon destroyed the Horus replicae during the Battle of Harmony, proclaiming it a "blasphemy" (as well as a potential threat to his own control over the Forces of Chaos as Horus' heir), and ordered his newly renamed Black Legion to raze Bile's Laboratoria on Harmony and destroy his experiments.The other Emperor's Children considered Bile's retreat from Canticle City with the remnants of his work as a betrayal. After the fall of Canticle City and Harmony, Bile found himself pursued by multiple foes, including his fellow Traitor Marines, the Craftworld Aeldari, the Dark Council, and even Fulgrim himself. He eventually returned to the Crone World of Urum.After these events Bile essentially left behind the cause of the Traitor Legions and became a "free agent", pursuing his own agenda. He has also successfully managed to clone himself, with several of his replicaes active in various places, as he is said to have secret facilities in a dozen locations across the Milky Way Galaxy. His arrogance and twisted amoral intelligence is more than matched by his sadistic cruelty.