Nasu the Corpse

Nasu

This god symbolizes all that is frightening about death, including decomposition and disease. All the demon touches, from flesh to spirits, falls to decay and corruption. 
He is a master of necromancy and has great power among the undead. 
Nasu hates and fears Ahura Mazda and his children, for they are among the few beings who can stand his presence and actually have a chance of purifying the monster, thereby destroying it. 
Nasu is extremely loyal toward Ahriman, who has promised him control over the bodies and souls of all the victims of his wars. 
Over the past few centuries, he has tried to forge an alliance of vampire intelligences, led by him and subservient to Ahriman. He hasn't been very successful, since the vampire intelligences hate and distrust each other (after all, they are in competition). 
He has managed to recruit a weakened intelligence that fled Rifts Earth after a group of heroes managed to destroy its physical body (the creature responsible for the Dracula legends, perhaps?).