Arthur rotated his head to face Merlin, exasperated by that assumption, because damn well everything had changed. In a very immediate, drastic way. He clenched his fists on his lap and pursed his lips.
The magic hadn't bothered him. It had never been about the fact that Merlin was an idiot sorcerer, hoping to stay alive in the middle of the snake pit
What bothered him, above everything, was Merlin didn't seem terribly troubled by keeping secrets.
He couldn't speak without shouting. And his throat felt sore from thinking about it.