The Legend of Sigurd and Gudrún claims that he desires only to avenge his father. The gold and the glory, he adds, are for Sigurd to keep. Twice Regin attempts to forge a sword for Sigurd, only to see the latter effortlessly break them. At last, Sigurd goes to his mother Sigrlinn and requests the broken pieces of Grímnir. Regin takes these and forges the sword Gram. Although Sigurd wishes to slay Fafnir then and there, Regin tells him he must have a horse. In response, Sigurd buys the horse Grani, who was sired by Odin's eight-legged steed Sleipnir, and goes forth to kill Fafnir. Later,
White horse (mythology) As part of its legendary dimension, the white horse in myth may be depicted with seven heads (Uchaishravas) or eight feet (Sleipnir), sometimes in groups or singly. There are also white horses which are divinatory, who prophesy or warn of danger. As a rare or distinguished symbol, a white horse typically bears the hero- or god-figure in ceremonial roles or in triumph over negative forces. Herodotus reported that white horses were held as sacred animals in the Achaemenid court of Xerxes the Great (ruled 486–465 BC), while in other traditions the reverse happens when it was sacrificed to the gods.