Cult of the Sump Mother
From Warhammer 40k - Lexicanum
The Cult of the Sump Mother was a Necromunda Helot Cult that was located in Hive Primus and was said to have worshiped the Hive's Sump as a living profane god. However, rumours in the Underhive claim the Cult no longer exists after its god, known as the Sump Mother, fused them all into a giant Chaos Spawn that dwells in the depths of Hive Primus.[1]
See Also
Source
- 1: Necromunda: The Book of Ruin, pg. 36 - Abomination of Badzone 12