Fenrir

Fenrir is an immense wolf that was begat through the coupling of Loki and a jotunn, raised by Odin and Tyr in Asgard. Fenrir later begat Garm, an immense wolf whose howls summon snowstorms; Hati, a wolf whose howls summoned destructive winds; and Skoll, a wolf whose maw dribbled with sparks and whose cries summoned volcanic eruptions from the earth's depths.