Harry can't help the little almost-manic laugh he gives at that. There's no fucking way he would use a power like that. He's not that altruistic.

"Not exactly... I mean. It does work sort of like that, only..."

Aww, fuck, he's going to have to spill his whole life story to this fucking guy he doesn't know from Adam.

"It's like I said, give and take. I give someone an injury, I take some healing for myself. Or, I heal someone else, my own fucking doomsday clock ticks one minute closer to midnight."