Fenrir also known as Fenris-wolf he is the son of Loki and Angrboda the giantess. He is the brother of Hel and the Midgard Serpent. Fenrir was vicious and blood thirsty. Fenrir was so dangerous that the other gods bound Fenrir in chains; Fenrir repeatedly broke the chains until the gods made a magical invisible chain called Gleiphr. In the Ragnarok Fenrir breaks free from the chain and will devour everything however Fenrir is killed after killing Odin as Vidor Odin's son stabs him.