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,
Sleipnir legs may be the remnants of horse-associated divine twins found in Indo-European cultures and ultimately stemming from Proto-Indo-European religion. The encyclopedia states that "[...] Sleipnir is born with an extra set of legs, thus representing an original pair of horses. Like Freyr and Njörðr, Sleipnir is responsible for carrying the dead to the otherworld." The encyclopedia cites parallels between the birth of Sleipnir and myths originally pointing to a Celtic goddess who gave birth to the Divine horse twins. These elements include a demand for a goddess by an unwanted suitor (the hrimthurs demanding the goddess Freyja) and the seduction