Void-Chill

From Lexicanum

The icy chill of the void is a characteristic some daemons possess. Their blood is frozen into their veins and the air around them is freezing, so they do not show up on heat-detection auspices and any one nearby them gets damage from frostbite. Creatures which possess the void-chill are easily hurt from heat based weapons like flamers.

Sources

• Inquisitor Rulebook