Littlepip Regens a hindleg/heals a wound instantly

"A fleshy, grotesquely-misshaped worm floated on the surface of the water. I screamed as I realized it was one of my own hindlegs.

After several long minutes of terror, I realized I could feel both of my hindlegs. Barely able to breathe, I shifted my light, trying to look under the slab that was crushing me.

Both my hindlegs were there, intact and healthy… except one was the pink of exposed skin with only a light fuzz of a coat.

I had lost my leg in the fall… and I had regrown it!

I didn’t think it was possible to feel even sicker, but I did. A deep, soul-aching horror filled me as I realized that I wasn’t even a pony anymore. I was something else. I wanted to cry, to scream.

Was I a ghoul, transformed by the bomb? Or was this from my exposure to the taint? How far removed was I now from being one of the Goddess’ children?

At least the radiation would kill me before the room filled enough for me to drown. Unless I was enough of a pseudo-alicorn that the radiation wouldn’t kill me. I prayed that it was.

Please, please…. Celestia, I beg you…

Have mercy on me.

I turned off my light. It was better not seeing.

*** *** ***

Something wrenched the safe room. The concrete slab scraped against me as it shifted, drawing blood. The wounds were already closing as I tried to brace myself, worried that the slab might slide off. Then I felt the whole room lift, soaring into the air."

Fallout Equestria Chapter 39:
https://www.fimfiction.net/story/119190/41/fallout-equestria/chapter-thirty-nine-this-coming-storm