ToME: the Tales of Maj'Eyal

So trying to side with Slasul, but he summons the portal back to the dragon underneath himself. So I can't use it because I have no way to make him move without making him hostile.

Any way to fix this?

What would happen if I deleted the file in my save folder that is for Slasul's lair? Would that reset it?
Wondering if there's a way to see if he places it differently without having to go through the whole game again.

Also, I tried using the Rod of Recall and going in the dragon's lair the normal way. I killed him and went back to Slasul. When I try to learn the prodigy, I get an error message trying accept the changes. So that seems to be broken completely.

I already have Exotic Weapon Proficiency level 5, and waterbreathing from an item. Would that affect getting the prodigy?

Fixed

As for the error message, cant fix if you dont post it :/

I hit the "send error report" thing when it came up. So... you should have it. Wherever those reports go. :p