First of all not all parts of a fictional universe have to have the same level of technological advancements. Within that baseline you can do whatever you want it's fiction. Also the reader or audience doesn't know everything there is about the world and might have gaps of knowledge.
If they have steel swords all bets are off
You hate it but it's still true, it's a genre set entirely in fictional worlds.
What if the spell simply accelerates the healing process. Basically like a forward targeted reverse time reversal?
are you talking to the author? I doubt they are on lemmy.
I'm trying to be informed. 😅
Ice manerfish
My best hyptothesis is that in the center of each of those disks a hole may have been or still is through which pond water is wicking upwards and melting the snow in a circular fashion before freezing and coming to a halt. Hence the almost perfect circular shape and the weird lighter color in the center ... notice the crack in the center of the disk in the foreground?
That's a shame, cause that strikes me as exactly the person who would get the most use out of it.