Reginn, often Anglicize as Regin, in Norse mythology, was the son of Hreiðmarr and foster father of Sigurd. Regin had all wisdom and deftness of hand. Regin built a house of glittering gold and flashing gems for his father. Regin and his brother, Fafnir, killed Hreidmar for the cursed gold he had received from the gods after they killed his other son, Ótr. Fafnir, however, turned into a dragon because he wanted to keep all of the gold (dragons frequently symbolize greed in European folklore). Fafnir drove Regin away from the gold. Regin lived among men. He taught men how to sow, reap, work metals, sail seas, tame horses, yoke beasts of burden, build houses, spin, weave, & sew. Regin sent Sigurd to retrieve the gold.