Fire
From BatWiki
Fire is one of the ten (harm included) elemental damage types in BatMUD. Undead NPCs have approximately 20% natural fire resistance. Wolfmen fear fire and have about ~50% vulnerability against it. There is a chance they wimpy when hit by a fire spell, but this can be countered by having 20% or bigger fire resistance boon, or equivalent amount of resistance from other source(s).
Damage types: acid, asphyxiation, cold, electricity, fire, harm, magical, physical, poison, psionic