In Norse mythology, Muspelheim ("Flame land"), also called Múspell, is a realm of fire. This realm is one of the Nine Worlds and it is home to the Fire Demons or the Sons of Muspell, and Surt, their ruler. It is fire; and the land to the North, Niflheim, is ice. The two mixed and created water from the melting ice in Ginnungagap.
According to the Ragnarok prophecies in Snorri Sturluson's Gylfaginning, the first part of his Prose Edda, the sons of Muspel will break the Bifrost bridge, signaling the end of times.