Sleipnir about the god Baldr's bad dreams, Odin places a saddle on Sleipnir and the two ride to the location of Hel. The "Völuspá hin skamma" section of "Hyndluljóð" says that Loki produced "the wolf" with Angrboða, produced Sleipnir with Svaðilfari, and thirdly "one monster that was thought the most baleful, who was descended from Býleistr's brother." In the "Prose Edda" book "Gylfaginning", Sleipnir is first mentioned in chapter 15 where the enthroned figure of High says that every day the Æsir ride across the bridge Bifröst, and provides a list of the Æsir's horses. The list begins with Sleipnir: "best
Sleipnir fetched and led forward." Hermóðr mounts Sleipnir and rides away. Hermóðr rides for nine nights in deep, dark valleys where Hermóðr can see nothing. The two arrive at the river Gjöll and then continue to Gjöll bridge, encountering a maiden guarding the bridge named Móðguðr. Some dialogue occurs between Hermóðr and Móðguðr, including that Móðguðr notes that recently there had ridden five battalions of dead men across the bridge that made less sound than he. Sleipnir and Hermóðr continue "downwards and northwards" on the road to Hel, until the two arrive at Hel's gates. Hermóðr dismounts from Sleipnir, tightens Sleipnir's