Xelxyx
Xelxyx the Shriveller was a master Haemonculus who captured several Primaris Space Marines and took them to his Sub-Realm within the Webway for experimentation.[1]
When the Deathwatch learned of this, they dispatched Fortis Kill-Team Ultraen to rescue the Primaris Marines. However by the time the Kill-Team reached them, the Primaris had already been fully dissected by Xelxyx and new life-forms created from their genetic material, were growing in the Haemonculus' genesis-cauldrons. Knowing that they could not allow such genetic lore to fall into the hands of the Dark Eldar, the Kill-Team sacrificed themselves by triggering the extrophic viral warhead they had brought with them. The results of the bomb's explosion were hideous, but it ensured Xelxyx's new knowledge and growing experiments died with him.[1]
Sources
- 1: Codex: Deathwatch (8th Edition), pg. 27 — The Vigil of Aeons: Forbidden Lore
