Sleipnir (pronounced “SLAYP-nir”; Old Norse Sleipnir, “The Sliding One”) is the eight-legged horse of the god Odin. Sleipnir is one of Odin’s many shamanic helping spirits, ranks that also include the valkyries and Hugin and Munin, and he can probably be classified as a fylgja. Odin rides Sleipnir on his frequent journeys throughout the Nine Worlds, which are held in the branches and roots of the world-tree Yggdrasil.