You should post a question about that dialog over at the co8.org forum. People like Livyona have been modding like crazy lately, and changing dialog all over the place. They could probably find out in a minute or two if anything in that dialog is affected by Mona.
As for killing Cuth-boy, I can't say how they got him to appear, but I'm pretty sure Iuz was dead first, or else they would have talked to each other. Anyway, I think the guy used spike growth to slow him down and then pelted him with arrows, waiting for natural 20s to hit him. Sounds pretty boring and not really a big challenge in the end, to me, but whatever. Anyway, I don't know if any slide for that comes up, but if you kill Iuz you do get one about how he has been banished to his own plane, much weakened, and ..."Iuz fears you." Nice, huh?
