Fafnir, FAHV nihr, in Scandinavian mythology, was a man who turned himself into a dragon. Poems and stories from medieval Iceland describe Fafnir as a powerful, greedy, and violent man with magical powers. Fafnir killed his father, Hreidmar, and stole his family's gold. He then turned himself into a dragon and spent the rest of his life guarding the gold. Fafnir's brother Regin tried to get the gold back and asked the hero Sigurd to kill Fafnir. Regin planned to betray and kill Sigurd after Fafnir's death.