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Void-Chill
From Warhammer 40k - Lexicanum
The icy chill of the void is a characteristic of some daemonic possessions. The victim's blood is frozen into their veins and the air around them is freezing, so they do not show up on heat-detection auspices and anyone nearby takes damage from frostbite. Creatures which possess the void-chill are easily hurt from heat based weapons like flamers.[1]
Sources
- 1: Inquisitor Rulebook, p. 54