Loki (lōˈkē) [key], Norse giant (or deity) who personified evil. He hated the gods of Asgard and continually sought to overthrow them. His worst exploit was the murder of Balder, for which he was punished by Thor. It was prophesied that when Ragnarok (the doom of the gods) occurs, Loki, with the aid of his monstrous children—the Fenris wolf, the Midgard serpent, and the goddess Hel—would lead the enemies of heaven.
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