So I've cleared it all out, used both the levers, and the door that is supposed to open is open. Great, I can go in and kill the demon, right? No... there's no way to get into the corridor to go through the door that just opened! If you look at the map, I'm stuck trying to enter the big long corridor directly South of the Demon of Lies. Anyone else encountered this, or know of a possible solution? I've already checked all around the corridor for a door that I may be missing but I've found nothing.