Yeah. But I haven't yet found a die-off that looks like it might be her.

Are there other things that make witches more powerful?

Not that I know of, but if there's an exception it could easily be this one.

And I suppose searching the whole area she might have come from would take way too long.

It's sort of what I've been doing, in between other research.

What are you going to do when you find her?

I was basically thinking 'if she's small enough to kill, kill her' but the song might work.

And then let time continue normally?

Not necessarily. Still have to figure out what to do with the aliens. It's possible they will just go mind their own business if I bribe them with the recording though, they're in this solely for emotional energy and not just because they suck. I guess they'd still need people to listen to the song and a way to get the energy out, that might be a problem.

People might volunteer. A lot of people like being happy.

Yeah, but the fluffs don't actually value informed consent, so I'd need to retain some leverage over them to get it set up so, like, depression patients can go be happiness batteries for a while on a volunteer basis, instead of - something else.

And I suppose they can't swear to things. All right.

Yeah, that'd be convenient if they could.

Should we go find a witch to throw the recording at?

Do you want to come along?

I'm curious and I can't die anymore, so yes? But if it's more trouble I don't have to.

It's not especially, although this will be less 'exciting witch tour and exhibition fight' than 'hello aquarium witch, here is the middle of you, now we are outside the barrier waiting to see if the song does anything'.

I think I'd find a fight more terrifying than exciting. That works fine.

Okay then. I usually do my witch hunting at night, but aquarium witch lurks someplace sparsely populated, we can probably find her there without anybody noticing even in broad daylight.

Thataway they go.

She should be nervous but maximum strength happiness song.

It is possible that if you seeing the fluff was a fluke that you won't be able to see the witch either, in which case I'll nip in, throw the song at it, nip out and get you clear.

Thanks. 

And when they get to the aquarium witch's neighborhood they get out of the car and Bella baubles her gem and dowses, walking slowly, moving the jewel back and forth.

She watches.

Eventually Bella gets a result, changes direction - Let me know pronto if you notice your song wearing off faster than it should or anything. Puella magi don't have miasma problems but I'm not sure that potentials never can, nor am I sure that you're legitimately a potential.