So Luna gathers up the cat in her arms. "Is that better?"

"Much, thank you." The tabby settles herself comfortably, much more mindful of her claws than a real cat would be.

"Cresthill is south-southeast of here - on your left, just a bit to the right of where that tree is starting to turn gold - but if you bear east of that, you'll find one of the main roads leading to it without overshooting if you get lost."

"Alright." She flies up above the treetops and starts floating in the direction indicated at a pretty fast pace. She fiddles with a bracelet on the other hand and the wind stops blowing on them. They start to fly faster.

Even at speed it's over an hour's flight. The view is pretty, all late summer foliage just beginning to turn color - not that she'll necessarily be able to see it, in the dark - and a couple times they can see the glow of a smaller town in the distance; Deviskaryl provides periodic course corrections when Luna begins to drift.

"You could tell me about the other worlds you've visited, if you like," she comments after a while.

"The last world I visited was very built around it's magic system. You could do magic rituals to transform some materials into other more useful forms and a lot of what I would tend to expect to be done by artisans or manual labor was done by various magic rituals or by flowers that were created using magic rituals."

"That sounds interesting. A little bland, maybe, for my tastes."

"It was very, orderly. It was pretty but it lacked some in variety."

The cat adjusts her ears and shifts her weight in a way that's interpretable as a nod. "Orderliness is useful, people generally do best when they know what to expect from things, but I'm not very fond of it for its own sake."

"I can understand that. I wasn't my favorite world either. It didn't seem to have the same incentives for creativity that my original world, or the not-quite world that gave me my magic system have."

"And what were those like?"

"My original world was a place without any magic, but they had advanced technology that could do incredible things. Most people were very accustomed to those things so they didn't seem incredible anymore but especially now that I've seen other worlds I really appreciate them. We could talk to someone on the other side of the planet for very little money and with virtually no delay. We built large flying machines that could carry us over oceans in comfort and at great speed. There were thousands of other little conveniences as well. There were also costs, prices we paid for mistakes we made getting to that point."

"Wow."

"It was a nice world, I will probably visit at some point and find my other self to make sure she's well."

"It sounds amazing."

"It is wonderful in many ways, but almost everyone is always in a rush and the air is dirty in a way you can't always notice until you've breathed clean air again. It isn't perfect, no place I've visited is."

"And it's hard to find two people who agree on perfection anyway. But I could clean the air."

"That's an interesting thought. I don't know what would happen if I tried to introduce a real goddess to my world. People worship all sorts of gods there but I don't think any of them are real. They tend to be these very big vague things that don't do anything conclusively attributable to them. People are very attached to them anyway though."

"It wouldn't be especially hard, if you can get there, and I could just relinquish my claim if it goes too badly - that's also costly, but it sounds like it might be worth it anyway, it's not hard to prove that I exist."

"It's something to keep in mind. I'd have to think about it. I worry that it might make some of the people who are too wrapped up in their religion do terrible things."

"Yes - a long term plan if it's a plan at all; I'd want to make sure it wouldn't distract me too much from my responsibilities here, too, and that takes time. But it's definitely possible, if we decide to."

"Indeed, could you change the carbon dioxide concentration of the atmosphere for the whole planet at a meaningful speed?"

There's a pause while she considers. "It would depend on how big my domain was, and how it was arranged, and what you mean by 'meaningful', and what else I needed to do at the same time. But if the conditions were right, yes, I expect so."

"Around the time I left people were starting to talk a lot about the concentration of carbon-dioxide. It was above four hundred parts per million. The scientists were saying it really ought to be closer to two hundred eighty."

"That sounds unpleasant."

"What I could do, actually, would be modify some plants - a few species, probably, for different climates and things - to take care of that, and then people could plant them all over, beyond what I could claim as domain. That will take some work, I haven't done anything that complex before, but it'll be much more efficient in the long run than doing it directly."

"That's an interesting idea. I don't know enough about the science to tell you if that would work."