Surtur becomes a recurring foe in the title "Thor", and first attempts to invade Asgard during the Odinsleep when Loki has briefly taken control, causing Loki to flee Asgard, but he is repelled and imprisoned. Surtur reappears wielding the huge magical blade Twilight, and after sending a horde of demons to invade Earth storms Asgard. The heroes of Earth battle the fire demons while in Asgard Surtur defeats both Thor and Odin in turn. Loki deceives Surtur with an illusion until Odin recovers, who battles the fire demon until both fall into a dimensional rift. After a long absence Odin returns to Asgard, and it is revealed that he absorbed Surtur's essence, which eventually possesses him. Surtur manages to recreate his physical form and decimates Asgard until Thor, wielding the Odin Power, banishes Surtur to the Sea of Eternal Night.