Jörmungandr

Jörmungandr is the Midgard Serpent (also World Serpent) in Norse mythology who encircles the realm of Midgard. He is the son of the god Loki and the giantess Angrboða and brother of the great wolf Fenrir and Hel, Queen of the Dead. At Ragnarök, the Twilight of the Gods, he slays and is slain by the god Thor.