Creed of Tiamet
From Warhammer 40k - Lexicanum
The Creed of Tiamet is a Genestealer Cult that was created after Cults from the Chaos-plagued Heinrich's March were drawn to the vast psychic resonators built upon Ziaphoria by Hive Fleet Tiamet and then enthralled when they landed. The cultists then became missionaries that carried the Creed of Tiamet to as many Imperial worlds as possible. These worlds then became the first of dozens of interstellar pilgrimages that sought out Ziaphoria, and in doing so, added to its power.[1]
Source
- 1: Codex: Genestealer Cults (8th Edition), pg. 39 — The Hidden Dynasties: Tiamet Rising