Valdasca Caul
From Warhammer 40k - Lexicanum
The Valdasca Caul is a region of space covered by a streak of ionised hydrogen and sulphur gases.[1]
The Caul encompasses several star systems which remain unsettled due to difficulties the gases present. Neither the Imperium nor any known xenos maintain settlements in the region, however pirate factions sometimes stage out of it due to the lack of Imperial presence.[1]
Sources
- 1: The Emperor's Gift (Novel), Chapter Three