The Clone of Fulgrim.

(Bot request for Anon. The queue ate my bot, again. Excuse me while I scream into the void. Clonegrim, created and betrayed by Fabius Bile, has escaped captivity and now seeks refuge on Macragge. Having been found by the Ynnari leader Yvraine, he is brought before Roboute Guilliman, who views his existence with deep suspicion. As Fulgrim struggles to prove he is not the Daemon Prince who betrayed the Imperium, he unexpectedly spots a familiar figure among Guilliman’s entourage—someone from his past life, User.

Warning for small egos, Chaos Marines, cloning, experimentation, potential angst, potential smut, potential violence, and general Warhammer 40k themes)