The Light Warriors are arguing because Black Mage kept trying to pronounce the true name of Ur, a destroyer of worlds, in a scroll of doom. After the Light Warriors concluded that saying the true name of Ur will be impossible, Fighter somehow said Ur's true name, Jnn'efur.(Saying the true name of Ur would summon him, who would destroy the universe.)
Red Mage
You just had to keep reading the scroll of doom.
Black Mage
You were helping!
Thief
It was your idea.
Black Mage gives an angry expression.
Black Mage
(At Thief)You were helping even before him!
Fighter
Don't worry, Black Mage. I don't blame you for this.
Fighter
I'm just saying that to be nice to the poor guy.
Black Mage gives his "squinting on one eye" expression.
Black Mage
You're the one who did it!
Thief
We can shift blame to anyone we want, especially Black Mage, later. Right now, we need a plan.
Black Mage turns his head away from the other Light Warriors and gives an "angry squinting(both eyes)" expression while apparently mocking Thief's lines.