ok i killed elyssia and got all her stuff, including the wand and masque of death. then i go up to the door behind her, and then end up w/ a caged door in front of me. it wont open, and i cant find any lock thing for it! am i supposed to kill all of her priest helpers, go another way, or something? maybe its just something i havent noticed...

There's a skull lever on the south wall of the short hall at the top of the stairs...