The shadow wolf, d, is a monster added in SLASH'EM. Its stronger bite attack can do cold damage, and it is somewhat fast.
Shadow wolves are slightly slower and weaker versions of mist wolves. They can be a threat if you lack cold resistance, but are otherwise unremarkable for when they appear.
This evil creature (_canis tenebrous_) lurks in the darker, more
sinister corners of the world. Its bite is known for its chilling
effect upon humanoid flesh, and it is not a tameable animal.
[ The New Bestiary, Wizard Endlebrook ]