Muspelheim is one of the nine realms in Norse mythology, often depicted as a fiery land inhabited by fire giants. It is ruled by the fire giant Surtr, who wields a flaming sword and is prophesied to play a significant role during Ragnarök, the end of the world in Norse beliefs. The realm is characterized by its extreme heat and volcanic landscapes, contrasting sharply with the icy realm of Niflheim. Muspelheim is considered a place of chaos and destruction, but it also represents the primal forces of creation, as fire is essential for transformation and renewal in the cosmos.