“The first world to exist, however, was Muspell in the southern hemisphere, it is light and hot and that region flames and burns so that those who do not belong to it and whose native land it is not, cannot endure it. The one who sits there at land’s end to guard it is called Surt; he has a flaming sword, and at the end of the world, he will come and harry and will vanquish all the gods and burn the whole world with fire.”
“Many ages before the earth, Muspellheim was shaped; the first world. A light, hot and fiery place glowing and burning, in the south region. There dwells the demon Surt, guarding the realm with his flaming sword.”
Muspellheim is a realm perilously close to its sun, but the currents of Yggdrasill flow through it and so life arose, life had to arise, had to cope. Its people are large, their bodies wrinkled and webbed to lose heat, and dancing in fire is nothing to them. They are kin to the jotnar in some ways, in their temperature-formed blades of blistering, terrible heat rather than ice, and their cities are melted together with the heat of a thousand furnaces. As a civilisation, they are young, but restless and hungry, burning through their world and its resources and soon looking outward. Fear of Asgard held them, but there is a new leader who sees the shape of the universe, sees the worlds they could conquer. They do not intend to bring destruction, but bring it they will once they learn how to sear through spacetime.