Meanwhile, in Urianger's hide-y hole in the Sands:
On occasion the truth may issue from the mouths of fiends and foes. Our knowledge is dwarfed by our ignorance.
Actually, Fiends. Look at those Fiend lyrics. Oh my.
Can I go on an unrelated tangent? I'm going on an unrelated tangent.
Urianger is vicious.
Even completely discounting the fact that he potentially got the Auracite from Elidibus, what's the first thing he asks you to do with it?
Avenge Moenbryda.
But, uh, you already did. Nabriales is dead, Igeyorhm and Lahabrea had absolutely nothing to do with Nabriales being an idiot and getting himself killed.
It's one thing to ask you to kill them for the 'greater good' or some such, but he's just all spite.