In Norse mythology

Norse mythology

Norse mythology, a subset of Germanic mythology, is the overall term for the myths, legends and beliefs about supernatural beings of Norse pagans. It flourished prior to the Christianization of Scandinavia, during the Early Middle Ages, and passed into Nordic folklore, with some aspects surviving...

, Muspelheim ("Flame

Flame

A flame is the visible , gaseous part of a fire. It is caused by a highly exothermic reaction taking place in a thin zone...

 land"), also called Múspell, is a realm of fire

Fire

Fire is the rapid oxidation of a material in the chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition....

. This realm is one of the Nine Worlds and it is home to the fire jötunn or the Sons of Muspell, and Surtr

Surtr

In Norse mythology, Surtr or Surt is an eldjötunn. Surtr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson...

, their ruler. It is fire; and the land to the North, Niflheim

Niflheim

Niflheim is one of the Nine Worlds and is a location in Norse mythology which overlaps with the notions of Niflhel and Hel...

, is ice. The two mixed and created water from the melting ice in Ginnungagap

Ginnungagap

In Norse mythology, Ginnungagap was the vast, primordial void that existed prior to the creation of the manifest universe, corresponding to the Greek notion of Chaos...

.

According to the Ragnarök

Ragnarök

In Norse mythology, Ragnarök is a series of future events, including a great battle foretold to ultimately result in the death of a number of major figures , the occurrence of various natural disasters, and the subsequent submersion of the world in water...

 prophecies in Snorri Sturluson

Snorri Sturluson

Snorri Sturluson was an Icelandic historian, poet, and politician. He was twice elected lawspeaker at the Icelandic parliament, the Althing...

's Gylfaginning

Gylfaginning

Gylfaginning, or the Tricking of Gylfi , is the first part of Snorri Sturluson's Prose Edda after Prologue. The Gylfaginning deals with the creation and destruction of the world of the Norse gods, and many other aspects of Norse mythology...

, the first part of his Prose Edda

Prose Edda

The Prose Edda, also known as the Younger Edda, Snorri's Edda or simply Edda, is an Icelandic collection of four sections interspersed with excerpts from earlier skaldic and Eddic poetry containing tales from Nordic mythology...

, the sons of Muspel will break the Bifröst

Bifröst

In Norse mythology, Bifrost or Bilröst is a burning rainbow bridge that reaches between Midgard and Asgard, the realm of the gods...

 bridge, signaling the end of times:
The realm of Múspellsheimr appears as 'Muspel' in Gene Wolfe's book series, The Wizard Knight

The Wizard Knight

The Wizard Knight is a series of epistolary novels written by fantasy and science fiction author Gene Wolfe. It chronicles the journey of Able of the High Heart, an American boy transported to a magical world and supernaturally aged to adulthood...

. It is inhabited by a dragons, which include a close parallel to Surtr, Setr.