The Warp Gheists are a thrallband of Heretic Astartes dedicated to Tzeentch. The Warp Gheists was originally formed by members of the Thousand Sons Traitor Legion who were exiled by their Primarch Magnus the Red for aiding in the disastrous spell known as the Rubric of Ahriman that created the undying Rubric Marines. Recently, the Sorcerer at the thrallband's heart, the Exile Magister Nezchad Aratos, enacted a revivification ritual to restore his exiled brethrens' physical forms -- but only as far as their skeletons. He died in the process, leaving his sect to scour the galaxy ever since in search of similarly powerful magics.
- Siege of the Fenris System (ca. 999.M41) - The Sorcerer Lord Nezchad Aratos and his warband were recruited by Ahriman to aid Magnus the Red in his invasion of the Space Wolves Chapter's homeworld Fenris. The invasion was ultimately defeated by the Space Wolves and their allies, but Aratos and the Warp Gheists escaped the Imperium's wrath.
The Warp Gheists thrallband's symbol is a yellow sigil of the Cult of Duplicity centred upon a field of azure and trimmed in gold.
- Codex Heretic Astartes - Thousand Sons (8th Edition), pg. 22
- War Zone: Fenris - Wrath of Magnus (7th Edition), pg. 134