Sleipnir, the eight-legged horse

 In Norse Mythology there was a horse named Sleipnir. He/She isn't an ordinary horse for he has eight legs and he is also known as Odin's steed. He is the child of Loki and Svaðilfari, who is owned by a disguised and unnamed builder who built the walls of Asgard. The story of Loki and Svaðilfari is that the gods hired the builder in exchange for the goddess Freyja but he will work alone with no help of any other man despite that he is more stronger than any man because he is a giant. But he is allowed to let his stallion ,Svaðilfari. to help him in his work.Before the deadline in summer the gods started to worry because he might finish the work and he might not forfeit the deal. Loki was all to blame because of his influence. The gods agreed that Loki should be given a punishment or death if he doesn't find a way to stop the builder before he finish his work. So at night the builder and his horse went into the forest to fetch stones, but while the builder was getting stones a mare suddenly appears, which is Loki, and the mare neighs at Svaðilfari . Svaðilfari starts to feel likeness to the mare and follows it throughout the forest while the builder was left alone in the forest. Thor suddenly went in the forest to kill the builder and the plan goes on and Thor gets to smash the builders' skull. While Loki "had such dealings" with Svaðilfari that in some time Loki gave birth to a gray,eight-legged foul named Sleipnir who in known to be the greatest horse among all gods and men.