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
Mordoc's Nightstalkers and Nightshades surrond Vahn, Kromlech and Adrianna.

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 adventurers 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.