Molag Bal is the Daedric Prince whose sphere is the domination and enslavement of mortals. He is known as the King of Rape and the Harvester of Souls. His main desire is to harvest the souls of mortals and to bring them within his sway by spreading seeds of strife and discord in the mortal realms. One legend claims that Molag Bal created the first vampire when he raped a Nedic virgin, who in turn slaughtered a group of nomads. He also made pacts other mortals and turned them into vampires such as Lord Harkon and his family. Thus it is implied Lord Harkon and his family are the original Volkihar Clan of vampires being directly turned by the Daedric Prince himself. He is a Daedric power of much importance in Morrowind, where he is always the archenemy of Boethiah, the Prince of Plots. Other enemies are Ebonarm and Mephala. His summoning day is Chil'a. In Aldmeris, his name means Fire Stone.
Molag Bal's plane of Oblivion is Coldharbour. The book The Doors of Oblivion says that his plane resembles a copy of Nirn, including the Imperial Palace, but all desecrated and ruined. The ground is sludge, the sky is on fire, and the air is freezing. The Daedroths are typically counted among his servants.