40d:Spirit of fire

Spirits of Fire are one of the possible creatures that will attack your dwarves if you discover glowing pits in Fortress Mode.

These creatures are the greatest of the three lesser demons. They will burn or boil everything that they come in contact with, and throw giant fireballs at dwarves. Spirits of fire cannot feel pain or bleed to death, and like all demons they are immune to traps. Their one weakness is that their limbs sever instead of breaking.

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