Sleipnir, is the son of Loki. An 8-legged horse, born when Loki transformed into a mare to distract the attention of another horse, when an unnamed giant was building the walls to Asgard. As a way to stall the giant's construction, because the gods did not want him to take Freya as his wife. Loki distracted the giants as a mare and this is when Sleipnir is conceived. Loki gives him to Odin, as Sleipnir is able to pass through the many worlds that make up the Norse universe.