Hii!, All you have to do is to kill the spectator while let him kill the Mastermind drow while fighting, if you prolong the battle long enough to get them all unpretrified, you can shove them to make them concious again and if only dhourn is killed, they will be neutral and talk to you saying how cool of a battle it was and how they don't know what to do now that their master is dead., they will probably kill you afterwards, but i killed them because my 4 customs are really goodies baddies as drows, so i dont know