 Leir, Caber, and Hercules then battled Ymir, and witnessed Asgard's victory over Ymir and Surtur.Leir then challenged Thor to a duel over Sif, believing him to be her champion, but was instead defeated in a duel with Sif.Leir possesses the typical powers of a member of the race of superhumans known as the Celtic gods of Avalon.