Not much is known about Ullr, beyond that he is counted among Odin's offspring and feared by the other gods.^[3] It is said that he helped create magic,^[1] rode a ship of bones,^[1] and first stoked a fire from yew logs.^[1] He was born to Gaea, making him a full brother to Thor.^[2]

Thor and Loki went to Ullr's home Ydalir to create such a magic fire to delve into Thor's memories to try and learn the secret of the older gods that had begun appearing.^[1]

When Thor called for a meeting of all Odin-spawn to seek the missing Tyr, Bragi summoned Ullr to the hall. Ullr teleported the group to the domain of the In-Betweener, where Tyr was held.^[3]