Originally Posted by
DragonsLover
Now that things have been fixed in KeeperFX, it may causes some levels like this one to become impossible to play, because some creatures are harder than they should be. To this effect, you have to tweak the campaign's some creature files to ensure their strength doesn't go beyond 255 and and their dexterity becomes low for some creatures because of some bugs that were originally in the game.
If you feel that it's complicated, you can skip that level until my future patch will be released.