Molag Bal (Online)

Molag Bal is the primary antagonist in. He is the Daedric Prince of Domination and Enslavement,  also known as the Father of Vampires, and God of Schemes.

Background
Molag Bal's main agent on Tamriel, the necromancer Lord Mannimarco, is working with the High Chancellor of the Elder Council, Abnur Tharn. Using Daedric machines called Dark Anchors, Molag Bal is attempting to weaken the barrier between the worlds of Oblivion and Nirn, threatening to merge Tamriel with his Oblivion plane of Coldharbour.

The main questline of  involves the player, known as the Soulless One, getting their soul back from the Prince of Slaves himself, Molag Bal.

Trivia

 * In, Molag Bal is voiced by Malcolm McDowell.