Ámsvartnir

Fenrir or Fenrisúlfr, also referred to as Hróðvitnir and Vánagandr, is a monstrous wolf in Norse mythology. In Old Norse texts, Fenrir plays a key role during the events of Ragnarök, where he is foretold to assist in setting the world aflame, resulting in the collapse of humanity and society, and killing the god Odin.