"Yes, that's what bindings are for. They'll keep the daeva in question from doing much of anything outside the bounds of the task and the payment. Which also need to be very carefully defined. If you ever summon more daeva be careful not to say 'yeah' or 'okay' or stuff like that."

"Yeah, okay. Well. I mean. It should be fine, then? So long as it won't do something like make me sprout a tail or give me bad 'mystical energy' or something potentially terrible like that? Nothing's happened summoning you, as far as I can tell, but still."

"As far as I know it doesn't affect the summoners at all beyond making them responsible for negotiating with and dismissing the person they summoned. And again, they're not all nasty. Just that they all can be, and non-fairies are more likely to be."

"Well, presumably if there are fairies like you, there are also – um, Changers and Makers? – who are like you too. Unless they're predisposed to certain personalities. Or there's cultural pressure. Or just magic. I have no idea. Um. Yeah, okay?"

"The problem is incentives. They don't need things from Earth as much. They can just make or change them. So the ones who takes summons are all assholes looking for the few things they can't just make."

"Okay, so something like books? Or maybe music or movies?"

"That works, sometimes, especially for changers. But makers can make everything an author ever wrote just from knowing their name. One summoner I worked with used the phrase 'hilarious infosec hazard'. The traditional way to pay makers is to have sex with them, or your soul. I have no good evidence either way whether souls are, in fact, a thing, or what they do if they exist."

"Well. It sounds like we can just leave the makers for later, in case it takes a while to find a nice one. I'm okay with a changer if all I need to do if hand them books, but depending on how alternate universe we are, they might already have most or all of the books I can offer them? It's not like I'll have any 'recent' releases."

"Luckily, changers will also tend to accept electronics. The spare computer I brought from fairyland, for example. Detail work like that takes a long time apparently."

"Oh! Okay, if you're sure. Uh. How would they help with the malaria extinction? Or was that just an example."

"We'd need a maker for the malaria extinction, unfortunately. But give me time to write up a shopping list and knock over a tree in the middle of canadian wilderness or something, and a changer will jump-start our little industrial revolution."

"Okay, sure!" she says, and unless he has anything further to say, she'll go look at some things on her laptop.

Nope, it's time to go back to the garage-workshop, apparently. Though the place is getting crowded and it might be time to find a warehouse.

Funny that. She's actually looking stuff up on the warehouses – she's made decent progress in between finding people to look at the tech, but she hadn't been totally focused on it.

She'll be ready with a few suggestions by the time he's done with his shopping list; Nick hasn't given her many actual requirements for the space, so she's mainly just finding a decent space that's relatively easy to access, hopefully out of the way enough that the telekinetic fairy magic won't be noticed but still easily accessible, and also not too expensive.

Yeah, his only requirement for the warehouse space is 'big'. He'll be building all the machinery inside it himself. He's making a lot of progress on that actually - most of the clutter in the garage is a series of increasingly elaborate drones that are smart enough to build things themselves, once told what to build.

He leaves off flirting for a day or two after discussing makers, but teasing and flirting is fun so he starts again sooner or later.

Eva tones down any potential flirting during those couple of days, but then continues at the previous pace afterwards. The drones are cool.

She's found a few potential spaces! One is smaller and slightly cheaper, but it's really far out of the way, so it'd be good for keeping hidden (although the inaccessibility is potentially inconvenient if they're dealing with other people). Another is larger, middling in price, and somewhat out of the way, but if there's lots of telekinetic fairying going on, it could definitely be noticed. The last is (in her opinion) the best, and it's slightly larger than the second one; it's out of the way yet still nice and accessible, but it's the most expensive of the lot.

(Internet guy publishes the video on their fuel-making machine. It seems to be doing well, and his reputation means people are hesitant to declare it a scam, but it's only the first day.)

...Nick runs the numbers and decides that the two viable options are renting the cheapest one and continuing as is, or ideally to rent the most expensive space and hire a changer to eliminate material costs in turn. He doesn't really think summoning a changer would be too risky, but then he's not the one taking the risk.

Well, Eva had decided that she liked the more expensive option too, so it's good that they agree. Summoning a changer, while somewhat scary, should be safe if they take the appropriate precautions, right? Because if so, she's decided she's okay with that.

Yep.

He spends a while reading books about summoning, then finds an appropriately tight binding. He doesn't translate it into a language Eva wouldn't know because that could introduce loopholes and ambiguity. So she will learn proper summoning mechanics, by reading the English paragraph to be written around the circle that starts with 'I summon an angel' followed by a lot of 'they shall not this or that' and such.

They should do it in their new warehouse, after Nick has assembled several large piles of wood for raw material and tanks to hold liquids and things like that.

Okay! Well, that's good, because the warehouse is ready to go! Eva gives Nick some directions to get there (it's not too far – it's closer than the Internet Person) and waits for him to set stuff up.

Setup takes another day or two. He makes sure she understands the binding, which will mostly just prevent them from leaving the area or using the changing-power, except on the defined task. She should probably leave most of the negotiating to Nick, he's more familiar with how this works.

Okay, so they're ready to go?

Yep, all ready.

She writes out the binding, as described, and completes the circle.

And here is a winged humanoid for her effort!

"Greeting, Summoner," he says, smiling.