Bitter-Sump is a Skaven settlement-burrow and the strong hold of Clan Scruten. [1a]
It lies in the Cursed Marshes, near Marienburg. [1a]
Orignally known as Rat Rock, it was inhabited by by several competing Warlord Clans and the home of thousands of the skaven and their slaves. [1a]
However they were assailed by an unknown enemy who had command over the mist themselves and were described as cyclopean swamp-dwellers. Although the Warlords united against the common enemy they were wiped out, but are said to have killed their attackers as well. [1a]
Around 2000 IC, Kritislik led Clan Scruten to the rock and they have lived here ever since, masking their activities by pretending it is the work of the mythical daemons of the swamp. [1a]
The description makes it certain that the unknown enemy were the Fimir.
- 3: White Dwarf 302 (UK)
- 3a: The Under Empire, pg. 41