Right- Right, this might be enough to heal Dean. Cas crosses the room in two steps and reaches right into the mess of Leviathan on the floor, closing his hand around his Grace. It doesn't burn him as it had Sam, and when Cas lifts his hand dripping in Leviathan blood the Grace twists into a wisp of smoke that Cas breathes in. He crosses the room and with his clean hand, touches his fingers to Dean's forehead.

Nothing happens.

Castiel spits out an Enochian curse and turns sharply, rubbing his forehead for a second. He regains his composure and puts a hand on Dean's shoulder, urging him to sit down. "Dean, please. I'll get the kit. Sit down."