A vilderavn is a malicious shapechanging spirit whose typical form is that of an oversized raven with a wingspan of 6 to 8 feet that stands 2 to 3 feet tall. Vilderavns sometimes roam in the shape of wolves or dire wolves, and are known to appear as monstrous raven-wolf hybrids akin to black-feathered perytons. They can also walk in humanoid guise when they wish, often assassinating victims of rank and assuming their victims' places. They have an unusual affection for their swords, often granting them threatening names. Vilderavns are drawn to war and suffering, often haunting battlefields-especially during protracted sieges.