Cam is dipping a grilled cheese sandwich into a bowl of tomato soup when he feels the summons. He goes ahead and grabs it. Doesn't even drop the sandwich.
"Electricity: tame lightning. Runs all the cool future swag. I can probably do some of your water stuff on pure mechanical if you want though."
"Tame lightning. That's a bit of a scary thought. What would be best for the water stuff is things that are low-maintenance or at least low-workforce. Is the general plan here 'improve things and deal with violence or other unpleasantness as it occurs' or something else?"
"My plan is 'implement unambiguous, safe improvements while getting enough of my bearings to make fewer things ambiguous and more things safe'."
They're getting close to the city now. It begins suddenly, with high square walls. Inside the walls are clusters of colorfully decorated buildings, all at least six floors tall and some as much as fifteen. Some of the buildings have large sections open to the air, entire parks halfway up the city, and raised pathways are everywhere as well.
"We probably want to land and enter through the main gates, for politeness to Kell's guards if nothing else."
"I'm not really... scared of an army? Like, it seems like your magic system all has to play with physics, so I expect my ability to break physics attempting to harm me will remain intact. Also I could just sort of tranquilize them all." He lands where directed. "It could get inconvenient if they did something like hold civilian hostages or invent the deadman switch but I'd still give myself swell odds."
She descends gradually as they approach the city, landing on the side of the large road leading up to it. The guards are wearing chainmail and carrying crossbows. She shows them some sort of badge and they wave her through the gate.
They ask Cam, "Do you want to sign into Opri as a visitor, or a temporary resident?"
"Temporary residents are subject to taxes for any money they earn, inside or outside of the city, as long as they're registered as such. They are also permitted to own real estate and enroll in the public schools, if they so desire. And temporary or permanent residents are ineligible for extradition."
He comes back with a form. It wants Cam's full name, trade name if applicable, gender (male, female, non-binary), age, magical status (shaper, non-shaper, not attempted), a written description of his reasons for visiting Opri, city or country of origin (if applicable), and his signature under a paragraph agreeing to abide by local laws and ordinances.
Cam writes his nickname phonetically and, finding the W in his surname awkward in this alphabet, just translates it. Male. ...Twenty-two. Not attempted. Tourism and visiting friend. Not applicable. "Do you have a summary somewhere of the local laws and ordinances?"
"Don't harm others except in self-defense or registered and approved duels, don't steal, don't cause a public distrubance, if a guard or member of the police tells you to do something obey, don't harass people, don't interfere with the operations of the government, don't distribute controlled substances without a valid medical license, no public obscenity, which means you'll need a shirt... There's more, but that's the majors covered, I think."
"Steel, did I leave a shirt in your bag? I think I might have left a shirt in your bag."
"Thanks." Cam puts it on. "What are the limits on what guards and police may tell people to do?"
Steel is glancing nervously between Cam and the guard.
"I should hope so," the guard mutters. "Wait... You filled out the form incorrectly. You're a shaper, right?"
Steel has half a second of Cam blinking politely to step in before he has to make something up.
"You'd know more than me," the guard shrugs. "Have a nice day, Steel. Remember to keep your shirt on, Cam."
After they're away from the guard, "I could have sworn I warned you. Wings make people assume you're a shaper. Shapers can withstand our method of body modification more easily than non-shapers."
"Yes, you told me that. You didn't tell me it meant I'd have to pretend to be one. I can't produce proof of that on demand - can't see the stream, can't transmute things unless I happen to know enough about their chemistry to do it by making and then only in limited ways, etcetera. What about being a shaper helps with the add-ons, anyway?"
"Keep in mind that I'm not a full doctor, I only took a half-load of med courses for three years. Our way of body-modification is a lot less finessed than yours. The going theory is that shapers unconsciously support their add-ons in ways that baseline humans can't. Shapers will grow capillaries in a new appendage all on their own, they generate their own skin and sweat glands, their new bones grow marrow without grafting, their minds more easily learn how to control new muscles, and so on. Non-shapers do none of these things, so it's all manually created, and it's too easy to miss something and end up with a defective body."