In Norse mythology, Sleipnir is an eight-legged horse ridden by Odin and the child of Loki and Svaðilfar. Sleipnir is described as the best of all horses, and is sometimes ridden to the location of Hel.

Right at the beginning of the gods' settlement when the gods established Midgard and built Val-Hall" about an unnamed builder who has offered to build a fortification for the gods in three seasons that will keep out invaders in exchange for the goddess Freyja, the sun, and the moon. After some debate, the gods agree to this, but place a number of restrictions on the builder, including that he must complete the work within three seasons with the help of no man. The builder makes a single request; that he may have help from his stallion Svaðilfari, and due to Loki's influence, this is allowed. The stallion Svaðilfari performs twice the deeds of strength as the builder and hauls enormous rocks to the surprise of the gods. The builder, with Svaðilfari, makes fast progress on the wall, and three days before the deadline of summer, the builder was nearly at the entrance to the fortification. The gods convene and figured out who was responsible, resulting in a unanimous agreement that, along with most trouble, Loki was to blame.

The gods declare that Loki would deserve a horrible death if he could not find a scheme that would cause the builder to forfeit his payment, and threatened to attack him. Loki, afraid, swore oaths that he would devise a scheme to cause the builder to forfeit the payment, whatever it would cost himself. That night, the builder drove out to fetch stone with his stallion Svaðilfari, and out from a wood ran a mare. The mare neighed at Svaðilfari, and "realizing what kind of horse it was," Svaðilfari became frantic, neighed, tore apart his tackle, and ran towards the mare. The mare ran to the wood, Svaðilfari followed, and the builder chased after. The two horses ran around all night, causing the building work to be held up for the night, and the previous momentum of building work that the builder had been able to maintain was not continued.

When the Æsir realize that the builder is a hrimthurs, they disregard their previous oaths with the builder, and call for Thor. Thor arrives, and kills the builder by smashing the builder's skull into shards with the hammer Mjöllnir. However, Loki had "such dealings" with Svaðilfari that "somewhat later" Loki gave birth to a grey foal with eight legs; the horse Sleipnir, "the best horse among gods and men."

All published appearances of Sleipnir from before January 1, )-(95)}} are in the public domain.

Some notable appearances are listed below:
*Poetic Edda
*Prose Edda
*Völsunga Saga
*Hervarar saga ok Heiðreks
*Gesta Danorum
*Balder Dead, by Matthew Arnold (1855)
*“The Death of Balder,” by Anna McCaleb (1909)

*[https://en.wikipedia.org/wiki/Sleipnir Wikipedia]
*[https://comicvine.gamespot.com/sleipnir/4005-59602/ ComicVine]
*Myths in Media Wiki
Category:Legendary Creatures
Category:Norse Characters
Category:Unknown Creator
Category:Unknown Debuts
Category:Horse Characters
Category:Literary Characters
Category:Comic Book Characters
Category:Video Game Characters
Category:Shin Megami Tensei Characters
Category:Marvel Characters
Category:Dark Horse Characters
Category:Avatar Press Characters
Category:Ghostbusters Characters
Category:IDW Characters
Category:Valkyrie Crusade Characters
Category:Valkyrie Connect Characters
Category:Supernatural Franchise Characters
Category:DK Publishing Characters
Category:Hachette Characters
Category:Gargoyles Characters
Category:Disney Characters
Category:Guardian Cross Characters
Category:Blood Brothers Characters
Category:Kamihime Project Characters
Category:Lost Kingdoms Characters
Category:Tower of Saviors Characters
Category:Monsters of the Mind Characters
Category:Fantasica Characters
Category:Monster Rancher Characters
Category:Tartarus Game Characters
Category:Taimanin Characters
Category:Brawlhalla Characters
Category:Echocalypse Characters
Category:Overly Sarcastic Productions Characters
Category:Eerie Worlds Characters
Category:God is Dead Characters
Category:Qurare: Magic Library Characters
Category:Force of Will Characters
Category:Summons Board Characters
Category:Z/X Characters
Category:Overlord Maruyama Characters
Category:Destripando la Historia Characters
Category:Mitos y Leyendas Characters
Category:Marvel Cinematic Universe Characters