A Timber-Wolf is a manifestation of nature in a state of rage. It is composed of rough-cut or broken logs, branches, and leaves in the shape of a gigantic canine. A timber-wolf attacks by biting or trampling; in order to trample it must first move at least 10 feet. A timber-wolf can even attack structures like a battering ram, inflicting damage equal to its trample attack.

Magical weapons or spells are required to damage a timber-wolf. As it consists entirely of wood, it takes double damage from magical fire attacks; ordinary fire, however, does only normal damage. A timber-wolf has a kind of basic intelligence, albeit in a state of rage. Exactly what brings forth a timber-wolf is not known, but attacks on a forest (such as excessive logging or similar devastation) may be the cause. When one appears, its primary motive is to destroy or drive out whoever (or whatever) threatens its forest.