Fire Demons

The Fire Demons are a the primary race from Muspelheim. They're enemies to the Asgardians.

Thor: Ragnarok
When Thor Odinson traveled to Muspelheim and broke free from his chains, Surtur set the Fire Demons on him but many of them were defeated with ease by Thor and his hammer Mjölnir.

Physiology
Fire Demons have rock-like skin and a fiery core that is visible through their eyes, mouths and bodies.

Notable Fire Demons

 * Surtur - Ruler of the Fire Demons.

Trivia
To be added

Thor: Ragnarok
To be added