Fenrir

Fenrir or Fenrisúlfr, also referred to as Hróðvitnir and Vánagandr, or Vanargand, is a monstrous wolf in Norse mythology. Fenrir is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda and Heimskringla, written in the 13th century by Snorri Sturluson.