He was silent while Merlin healed him, feeling the injuries fade as quickly as he'd taken them on, leaving him with no pain but an incredible sense of frustration. He'd mastered his ability before this increase in power, and even combined with Nakama's it was now wild again.

"I did it incorrectly." Castiel finally managed a response to Merlin's question, casting a quick glance toward Nakama at her statement. "There's no point in starting smaller. I just need to make another attempt." Though not with the current patient obviously, who was apparently quite pleased at now being devoid of injury and was trying to leave the room to go home.