"Want me to send them? They're pretty helpful."

"Why not."

So on his way back out he tells Aaron to snag a Vala next time they're around.

And a while after that a tall woman with shimmery silvery hair whose presence rather emphatically radiates that she is a god walks into the infirmary.

"Uh," says Sara, "hi."

"Hi! Varda. I wanted to know if there was anything I could do to help you out in combating witches."

"So there is kinda this problem where magical girls are the ones who can kill witches but we can't kill them all or we won't have any magic any more and I think then we'd die or something."

"That does sound like a problem. How did the whole system start, do you know?"

"I dunno, maybe back when there were less people there couldn't be too many witches but now there's cities and stuff and they'd never starve till everyone was dead."

"So magical girls hunt witches, and killing witches is what gives you magic?"

"Yeah. Well to start out we run off wishes but that runs out fast."

"Can anybody make a wish? At any time?"

"Nah, most people can't, there's this cute fluffy guy who goes and finds people who can and grants them wishes."

"Does he have any ideas on the problem if all your witches were killed?"

"I never asked him."

"Would you mind opening your door so we can go into your world and look around?"

"Uh, what if a witch eats you?"

"I think they would probably find that very challenging."

"They don't like literally eat stuff. Mostly. They just make people miserable and violent."

"And they're invisible except to people who have made a wish and now have magic?"

"People who could make wishes too."

"Who is eligible?"

"Like high school age girls."

Nod. "Are there things we could do for you to make hunting witches safer?"

"Yeah, uh, while I'm here I can do magic and my gem doesn't get any dimmer," she points at it where it's set in an ornament on a sash around her waist, glowing robin's-egg blue, "but outside it does, it's bad if I run low."

"May I touch it?"