Surtur, Guardian of Muspelheim

Norse folklore.

Surtur is a fire giant and the guardian of Muspelheim in Eddic Mythology. He is one of the greatest foes the Aesir fight at Ragnarok and leads the forces of Muspell against the might of Asgard. At Ragnarok he is said to fight Freyr in combat armed with the Sun of the Slain, the bright sword of Surtur, who emerges victorious though the fight is close and it is said it would have gone in Freyr's favor had he not given his sword away to Skirnir.