SPOILERS AHEAD.
So after the trial of ascension, Dallis will show up and crash your party. The exact sequence is that you get knocked down, Dallis and her lackeys (hostile) appear, and then you enter dialogue with your whole party.
Now, I have a hate boner for that undead lady, and was trying to kill her a 4th time, and figured this is as good a chance as any. So, here's what I did.
Now, has anyone tried similar things but actually managed to kill her before she left? Is it even possible?