"I don't know. I don't know everything that's happened, and maybe..." Merlin pauses. "There was someone close to Arthur, who also had magic. And she...she betrayed us."

Merlin bit his lip. Thinking of Morgana he couldn't help but feel guilty. He'd nearly killed her - he hadn't wanted to, but he had. But she had helped Morgause, in a plan that would have ended with the deaths of everyone in Camelot. But he had hoped that maybe Morgana hadn't really wanted to kill everyone, that Morgause had just made her, that one day she'd come back and everything would be alright again. But from what Arthur had told him, that wasn't what would happen.

"If Morgana used magic against Arthur, I don't know if he'll ever be able to accept it."