I have fled the arena and woke up the slaves i have three of them collars to control the flayers. I can't open any doors anymore! The one that leads out and the other door in that same room.
Please help anyone as these are the only two doors I haven't gone through yet.
(I've killed all the flayers in the area I have explored so there is no more to charm)

Turn into the Slayer or enslave Ithillids to open the doors. (Only a powerful mind or being of great strength...hint, hint)

Illithid will respawn in the place you picked up the goop.