Svartalv (Swedish)
Svartálfar (black elves or dark elves) are supernatural beings from Norse cosmology who dwell underground in Svartálfheim, the world of the black elves. They are described as the light-avoiding counterparts to the Ljósálfar (light elves) who live in Álfheim. In Snorri Sturluson's Prose Edda, the svartálfar appear to be synonymous with the dwarves (dvergar), and Svartálfheim is considered interchangeable with Niðavellir (Dark Fields). The svartálfar are renowned as master craftspeople, and among their most famous creations are the Sons of Ivaldi's work: Sif's golden hair, Freyr's ship Skíðblaðn