But it was on him, every time Dean flinched, every time he bolted up in the middle of the night gasping for air. Dean went to Hell because of him. Because he hadn't turned in time, hadn't heard the attack coming. Should have been faster, should have been better.

He hadn't though. He'd died and Dean had sacrificed everything for him.

"Probably not." Not with the way Castiel looked at him. And not with the way he looked at Dean. "There aren't many seals left."

A long swallow. "There's got to be a way to stop her."