Svartálfheim is one of the Nine Realms and is home to the Dark Elves.

The Asgardians and other inhabitants of the Nine Realms refer to it as the "Dark World," while the Dark Elves themselves call it "Harudheen". Located in a star system that is almost completely corroded with dark matter, both Svartalfheim and the Dark Elves inhabiting it have developed under a more diverse table of elements.

The only source of visible light for the world is a black hole.