Surtr is a fire giant who leads his kin into battle against the Aesir and Vanir gods during Ragnarok, the destruction of the cosmos. His particular fate is to kill the god Freyr and to be slain by him in turn. He arrives from Muspelheim, the extreme southern region of heat and fire, bearing his weapon of choice of a burning sword, with which the world is razed before it sinks into the sea.
