Originally Posted by DSabre
If I'm right, as soon as you go down to the basement the thing will be waiting for you right outside the elevator/platform.
And I don't remember if the Library needed a key at all, I mean, I killed both the basement one and the necromancy chamber one, and yet, I don't think the keys I've got from them were of any use


Try mindreading the Goblin in the library.


There was no one other then Grim at the basement even after loadin frm several save points and reinstaling the game.
I had to send savefile to the aupport team and they cause the abomination monster to appear :
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=431029#Post431029