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Muspellheim (pronounced "MOO-spell-hame") is one of the Nine Worlds, more specifically the one inhabited by the Fire Giants and ruled by Surt.

Magnus Chase and the Gods of Asgard

The Sword of Summer

Surt (official)

Surt, the realm's ruler.

While Gunilla was giving Magnus a tour of Valhalla, she accidentally took the elevator to Muspellheim, burning herself badly when the doors opened. Much later at Fenris Wolf's prison, Magnus uses Sumarbrander to banish Surt and his Fire Giants back to Muspellheim.


  • Muspellheim and Niflheim were the first two worlds in existence.