Im in the place where mind flayers are in hte under dark and it sis i opened the other door that requires a mind flayer but the the other door wont open to them and sis no mere mortal can open it so none of my 3 mind flayers can open the door to the boss room plz help

I used mindflayers so I dont know why it wont work for you. Maybe someone else does good luck <bump>

Um... are you sure you're at the right door? There are three doors locked magically; one in the north part of the map, one in the west, and one in the north-east. The north-east leads to the surface, and cannot be opened until you kill the boss; the west leads to the boss. Otherwise, I'm not sure why the door's not opening.

The boss-door also has a regular lock. I had some trouble with that one too. In one of the rooms near the exit& the machine, there is a re-spawning area for mindflayers. I recaptured one there, and it worked. Also, 'beings of tremendous strangth' COULD include, say, the avatar of a god, no? =D

i had this problem once before when i used a collar to charm an ulitharid instead of a mind flayer. the ulitharid didnt do anything to open the door. luckily there was still a few flayers in the next room and they worked fine. if you still have a collar left, try killing everything there and then get your party as far away as possible from that last-door room; i think the game will spawn another flayer for you to charm (built-in failsafe since the last autosave was before you were even captured).

Kerlyssa is right.

Look on your special ability button of your PC if you can't figure it out.