...

"I hadn't realized things were that bad. I'm sorry." It sounds like humanity barely survived, and even the Beings were welcomed as an improvement. (Just as Being X always wanted.) "It's impressive you regained this much. I hope I can do my part to help civilization grow."

"That's the goal, generally. Make stuff, build things. Art. Industry. Science. Progress... Let's go inside."

Tanya follows her inside. "I have to say I'm very disconcerted by the nuclear weapons. Using just one could be a catastrophe, but so could the fissile material leaking into the water or air due to improper handling or containment finally failing. Do you have Geiger counters? ...ah, non-magical radiation detectors. I... don't actually know how to build one."

"I was assured by people I consider reliable that it was taken care of and would not present significant ongoing risks. I wasn't interested in the details, since they were nonmagical weapons."

"I was more worried about the unlocated silos you mentioned must exist! Do your friends have radiation detectors? They'd be key to finding any leaks, either from known or hidden sites. And to avoiding contaminated areas, obviously."

"Hmm. The nine faces front did pay me design an artifact to detect radiation, at one point... Ah, they're the equivalent here to Noten's 'inquisition', if that word is familiar. Religious investigation organization. Atsos's mirror organization, the nine faces, is more decentralized, less hard power in comparison."

Up the stairs they go. She does three separate spells to undo locks and traps before opening her lab door.

Investigating radiation spills is a definite improvement on investigating heresy and witchcraft, but it's insane to trust nuclear safety to a religious organization!!! What if they decide God actually wants some heretical sect to be irradiated?!

Tanya can't do anything about this, she can't even build a Geiger counter, but she does not like it.

The broader implications may take her some to process. There was an ancient, lost civilization with much better technology (and possibly worse magic?) which destroyed itself completely, leading to a long dark age and the rise of religion. This might help recontextualize some previous information! (Also, Sinnah is many centuries old? Are kitsune immortal, or perhaps simply serially reincarnated? This might be insensitive to ask and she shelves it for later.)

There are radio transmissions, but the general public seems to be unaware of them; the information clerk mentioned rumors about ancient artifacts but Tanya didn't have the context to understand that yet. She was worried about making enemies by disrupting an existing monopoly, and mystified by them not making more use of their monopoly. If someone found a working radio from two thousand years ago, surely they'd have reverse engineered it by now... but that only applies to simple, analog radio. If someone found a digital radio set from Tanya's first world, and had no concept of electronics, there might be nothing they could do but replace the batteries!

In that case, she has an obvious in: she can approach the existing owners of radio sets, whose dearest wish is probably to be able to make more of them and who have already thought of the most profitable uses and market approaches, and offer her knowledge. As an outworlder she'd be credible enough to merit a hearing, and she can also demonstrate receiving their transmissions with her orb. Since there are strong patent laws locally, she can apply for a patent that the the radio operators (who are based in this city) will want to buy. She doesn't even need to bargain for that much; even a one percent share in the profits of something as civilization-changing as radio would be more than enough for anything a private person could want.

She'll consult with Sinnah about this idea at the end of their session; she doesn't want to interrupt her obvious enthusiasm for studying magic. And then Tanya will have some follow-up questions for the information clerk.

While away she came up with a terribly clever or possibly cleverly terrible new detection spell! She wants to cast that in the isolation room first to make sure it hangs as she expects- The effects of miscasts are inconvenient, wouldn't want to subject Tanya to that- But after that, yes more magic studies! With lots of probing discussion on the theoreticals in between practical experimental attempts!

Her new detection spell detects something in Tanya and also in greater quantities in Sinnah, but she's not convinced it's mana, necessarily. It might be interworld-ness. Sinnah then gets distracted into what seems like a fluid simulation model of known Tirran magic flows on a giant map and wondering if the calculation orb's calculation techniques are applicable to fluid analysis.

One of the flight spell's core functions is to automatically adjust itself to maintain even flight at high velocities, and that involves a kind of fluid dynamics analysis, but it's not exposed as an explicit calculation where Tanya can see it because that's not how the orb works.

It may become clear from context that Sinnah is (for now) working on the Rift question rather than exploring Tanya's magic by trying to characterize latent Tirra-magic buildup, but she's not going to pause to explain it. And before long her attention wanders back the other way again. Papers with disorganized notes begin to accumulate. Eventually, the sun has set and Sinnah is not exactly slowing down.

Tanya wants to sync to the local timezone, but she does also want to sync to Sinnah's working hours. A few hours after sunset is normal, but as midnight approaches she'll ask when Sinnah intends to pause for the night.

"Oh, right, sleep is a thing. We can close up now. I don't want my main source on otherworldly magical knowledge to degrade due to poor maintenance, after all." Something in her tone is amused or even friendly. "What are your sleep comfort desiderata, anything easy to arrange at this hour should be thus arranged. I knock myself out with a spell when I sleep."

Sleep is a thing, but so is MORNING COFFEE!

"I usually sleep for seven and a half to eight hours. I won't have a problem falling asleep, soldiers learn to do that without any spells, I just need a bed. And I'll go out to get breakfast when I wake up, it shouldn't take long if I fly. ...I assume you don't have bathing facilities here either, are there public baths in the city? I forgot to check earlier. I'd pay for a hotel room, the only issue is whether I might not be safe there at night."

"I don't have a proper bath here. There are baths, both public and private. Nice hotels will have them. I have a cleaning spell if you want it instead. Wizardry, not witchcraft, which was an accomplishment. You have to identify unwanted substances by their physical properties... Safety again depends on your total risk tolerance, which seems low."

"...I just realized can't use a public bath because it'd be hard to keep my gun within reach so it isn't stolen, but I can pay for a private one, so that should be fine. It's true that I have a low risk tolerance, or rather, as a soldier I won't knowingly risk my life unless it's unavoidable and worth it. I don't know how likely it is someone will try to kidnap me, so I can't make informed tradeoffs, but I have nothing to gain from sleeping in an undefended location as long as I have an alternative. The question is whether I do in fact have a long-term alternative, and if not, whether it much matters what I do in the short term. I can't impose on you forever."

"If I make my useful knowledge public, and share my magic with you and let you share it with others if you want, maybe that will make me an uninteresting target and I'll be able to sleep easy. Or if I become rich enough, maybe I could afford magical protection or guards. ...I suppose I could fly out and camp in a different spot in the wilderness every night, and at least be hard to find for anyone who can't track me as I fly without me noticing, but then I'd have no-one to call on for help if anything happens, and any attack would go unnoticed."

"The risk profiles of a seemingly ordinary foreign individual and someone who is known to be a rich and famous Otherworlder are massively different. You are currently best modeled as facing the former. If you become the latter I would begin to suggest countermeasures such as securing a noble house's backing and security services, which would include a fortified and guarded residence and work area, bodyguards, intelligence gathering, monitoring and rescue services in case of an incident, and so on."