Similar to a Wendigo, I designed the corrupted beastly form of the Rabeno as a horned being punished by a disease caused for having consumed human flesh. In this case, the cause is having abused one of the maidens he kindnapped from the hero's tribe. It is also covered in moss to symbolize its old status as forest deity and will sometimes present a bluish light on its horns from the fae that would rest on its head. Ironically, similarly to a will-o'-the-wisp, these lights will sometimes attract lost wanderers to their demise.