I'm sort of stuck. So here's the situation, but before that, it's only
for gone-through-already players... since I'm going to mention some details...
Chapter 5 (I think), gone after Irenicus to Underdark.
Rightly okay so far. My party is quite terribly built,
I have to cast elementals and such to nearly all battles in the Underdark to survive.
There's no places left except the Southern Tunnel which has those nasty Beholders.
I even went through that with improved invisibility but didn't find what I wanted.
What I wanted was to find a way to open those gates, to enter the city where I must go.
The dragon gave me already a disguise to fool the guards.
But the problem seems to be that I accidentally killed the guards of the gate before I thought they should maybe left alive.... before I found the dragon.
So there seems to be nothing to do now about it.
There is no way out, so I thought is this a bug in the game...
The gates are closed beyond lockpicking and knock spells.
Would just seem a waste to get this far, and just collapse the save.