Mordoc SeLanmere

Mordoc SeLanmere, also known as the Pale Knight, was the self-proclaimed first and utmost powerful vampire king in all of Toril. Mordoc was the disciple of Eldrith the Betrayer, he, however, was not a loyal servant to her. He did provide to her slaves and members for her army.

Dark Alliance
All of the Lizardfolk but Sleyvas served Eldrith, Sleyvas served the Marsh of Chelimber. Possibly believing to end the tyranny of Eldrith in the Marsh, Sleyvas began to serve Mordoc. To destroy Eldrith, Sleyvas sent three adventurers to kill her, Sleyvas ended up betraying them and had hoped for them to die. Mordoc had hoped for himself to gain control of the Onyx Tower, Eldrith's fortress which was accessed through Elemental Planes. While Sleyvas had reported for the three heroes as dead, Mordoc kept them alive to rebuild the Onyx Tower.

Dark Alliance II
It is unknown as to what Mordoc did with Sleyvas but it is then revealed that he intended to destroy the city of Baldur's Gate. Mordoc was then killed by a group of five adventurer's after he attempted the destruction of the city by moving the Onyx Tower into the city interior. Mordoc himself was serving an unknown god, but it is known that this god launched an assault on Baldur's Gate, the result of the attack is unknown as well.