Eberron - Return of the Lich Queen
The elves are not content with their long life span or letting heroes to die. The elves have found a way to preserve their ancestors beyond death, anchoring them to the world of the living through devotion and spiritual sarifice. The Undying Court is seated in Shae Mordai and guide the nation from there. Unlike other undead the The Undying Court are sustained by their devotion of their descendents and have no need for blood or life energy like other undead. The followers of the The Undying Court see the Blood of Vol as abominations for felding of the living. The members of The Undying Court are not gods, but they are ancient, wise and powerful. Like other religions members of The Undying Court can lend powers to their followers.