Duke Vallenhal

Duke Vallenhal is a human death knight found at the Ruby Dragonshrine in the Dragonblight. He is accompanied by Worn Bloodworms. His unholy energy needs to be drained for In Service of the Unholy.

Abilities

 * Blood Presence
 * Bloodworm

Trivia

 * Duke Vallenhal took the place of Orbaz Bloodbane who was at the Ruby Dragonshrine at some early point in the alpha/beta. Presumably, this was changed so Bloodbane could have a bigger role in Icecrown, but Bloodbane is still mentioned as having killed Dahlia Suntouch.
 * His last name might be a reference to Valhalla, the last resting place for dead vikings, or possibly to 80's rock band Van Halen.