After I bought the "MAGIC ROPE" and entered the Lich's Tower I forgot that he's supposed to imprison me... So as soon as I entered the room, the game paused because "enemy is sighted". I see the Lich and decide to cast POWER WORD SILENCE on him, and bash him with all of my frontline fighters. The PWS spell worked and my fighters chunked him into a million pieces. I then go looting the entire tower and pick up the "soul gems". As soon as I picked them up I was transprted to the "other plain". I talk to these guys for a while then he tells me that he wants me to get the Soul gems from the Lich that I'd already killed. Apparenty I can't tell him that I already have them on me, so he sends me away and gives me ONE DAY to get the gems. Since I already have them, I decide to wait the one day and then try to enter the Lich's Tower. It won't let me in! It says he grew tired of waiting for me.
Oh well, I saved it BEFORE I killed the lich so I guess I'll have to LET him imprison me and do it the RIGHT WAY.