I finished the labryinth and went up the elevator to.... an empty room. Turned right down the sloping passage into another empty room. Picked the level 5 lock and got some stuff. No Lich. Is this where he is SUPPOSED to be? What do I do with the demonic statue that I can't pick up, if anything. Please help, I have been trapped in this stupid dungeon for 2 days (real time).
Thank you in advance.

from the room with the pretty picture of the dragon and lich on the door you just picked.

go up the stairs
turn right
cross bridge (after it has been locked to prevent falling)
you will come to a fork one way will lead to the entrance chamber (with the urns and skelly warriors that do not attack you unless attack ) the other will lead down a sloped (down) passage to a door that takes a key. This room behind the keyed door is the location of the fabled Lich. (took me a bit to realize there was a key hole here too )