Blackfire Disciples

This faction of Skull City is an order of necromancers and undead that believes that tomb’s fall marked Acererak’s true death. Though they have given up any reverence for the demilich, they continue to study his lore and his tomb for their remaining secrets. Their order is named for one such secret that they have mastered – the mystery of blackfire, which was created in Moil.
They bear the symbol of a circular orb surrounded by black flames. The symbol is born on the forehead of its members and their armor and weapons.

Blackfire Disciples

Tomb of Horrors ArchangelViper