Gamer's Body healing rate.

I swore, suddenly stumbling back to see claws where I'd just been, one of them having suck a blade under my guard, leaving what felt like a gash in my side before the other Faunus could bring his sword down on its exposed wrist, biting into it and knocking it downward. I stepped forward quickly and avenged myself upon it gratuitously. The last machine fell quickly under our blades.

And then I stood, panting hard in exertion but bizarrely elated. At what, I wasn't certain—survival? Victory? Perhaps a mixture of both, our perhaps it was just an adrenaline.

"Shit, dude, are you okay?" The Faunus to my right—a grey-haired boy who couldn't have been more than a year or two my senior and who had curling ram horns—asked as the last robot went down. He paused as he turned to me, looking confused. "Huh. I thought he got you."

I reached down to touch the spot that had hurt terribly moments before and which now felt perfectly fine, my clothes not even torn. Even without my Aura, even when it felt like I'd been hurt, there wasn't even a mark left behind. And yet…I called up my Status Screen and confirmed what I suspected; about half of my HP bar was gone.