"...who are you?" says one of the elves.

"I'm someone from another world who ended up here in an accident and now has to stay around until a way for me to be sent back is found."

"Who's doing summoning?" blinks a human.

He waves a hand dismissively. "Never mind that. I can see magic and there's lots in this world that doesn't exist in mine so I'm curious about all of it and she seems to have magic," he says, inclining his head in the pale person's direction.

"I'm a light," says the pale person.

"What's a light?"

She cups her hands. A little ball of turquoise sparks coalesces above them. "This."

"Ooh, pretty," he says, and squints at it.

"It does healing."

It does!

"Awesome! How generalised?"

"...very?"

Except it won't work on her or other lights.

He definitely can't tell the absence in generalisation is that specific thing. He can tell it's not perfect, though.

"It can heal anything? Any diseases and injuries and, anything?"

"I'd need training to do scar tissue or clean stuff out of a wound before I fixed it but yeah pretty much?"

"That's really impressive. How do you become one, or is this one of those things people are born with here? And does it have, like, a source, or a limit?"

"Born with it. And no."

"Huh. It..." His squint stops being metaphorical and becomes physical. "It doesn't look all complete. Or, I guess it could be, but... I dunno, it looks like there's something missing in it?"

"...missing?" She lets her hands drop.

He shrugs. "Can't really explain it, or understand without looking any further, and the sense doesn't translate neatly to, like, vision or anything. But. It doesn't look like it's a... neat round thing that could heal anyone of anything? Or not like what I'd expect it to look if it were that."

"I dunno how your thing works."

"I can see magic, for a certain value of 'see,' and I get almost zero intuition for it while I'm looking, and would have to learn to interpret it and stuff to draw any more conclusions. Knowing more, on a conscious level, about it helps draw the correct conclusions and make the right inferences to figure it out. I can also manipulate magic—at least magic from my world, wizardry does not lend itself to much manipulation easily and I haven't tried anything else—and borrow it, which I also haven't tried."

"...can you give it back after if you borrow it?"

"Yeah, and it's anyone's guess whether 'borrowing' here would even actually take something from whoever, since magic here seems to be infinite."

"Oh, you wouldn't just take, like, being-a-light."

"I'm speculating, here. In my world, I can borrow the mana, the fuel of the other three kinds of mage, and then use that mana to perform their kinds of magic. I can't make someone stop being a mage. Here, though, stuff might be different, because there isn't an obvious fuel I can take some of or put back, so it might well be that I'd take 'being-a-light,' or it might be that since magic here's infinite I'd just get some of this endless well."

"If you could take being-a-light that might be useful actually, we can't heal each other."