"My studies suggest that coming up with a clever idea for a wish is the most common way for ninth circle wizards to die."

"My native language works differently from other languages! It's a valid question! I'm not going to try to answer it because I'm not that stupid!"

"Very fair."

"...I admit to being slightly less idly curious about 'enhancing your mental and physical abilities,' though. If it's safe." 

"There are six known wordings for humanoids that enhance strength, grace, health, cleverness, wisdom and social abilities; I don't know if they would work for type of outsider, but though I expect it would be safe - I would still use divination spells to check and do it outside Golarion, where most prophecy does not function. It is extremely expensive for anyone not you, and the only wizard I have located who can cast Wish is Felandriel Morgethai, who is responsible for the free republic of Andoran, the first place in Avistan to ban slavery, not being subject to Cheliax and Hell. You'd like her, I think; she's Chaotic Good and - takes Good seriously."

"Oh good! Most people back home did not take Good seriously, I really am excited about that part of being here." 

"Why not?" He always did.

"Well...it's not that nobody was trying to do good. But the overlap between people who had power, and people who cared about the people who didn't have power, was pretty small. There were lots of people who thought, 'if I just keep this one narrow area of concern stable and within the status quo, that's fine' and didn't question whether the status quo was good enough. And lots of people who didn't care what happened to anyone else, as long as their own goals were achieved. And lots of people who couldn't recognize someone as a person who looked very different from them until you ground their nose in it like a misbehaving puppy."

"My father was the only other person I met who really recognized that things systematically weren't good enough and did something meaningful to change it. Father invented the life-light. It took a long time. Before that, they could only put out sunlight, like their father, my grandfather. But now that both kinds exist, people like us who are part star can switch back and forth." 

He nods. He's met people like that, but - the gods may not be all good, but the Good gods are, and they're something to look to. "And the life-light is what you used to restore me and mine?"

"Right! Sunlight--the kind of sunlight that shines on my planet, anyway--enforces the laws of the Judgments. It's what I would use if I did decide to kill all the undead in Ustalav instead of healing them." 

"Sunlight on Golarion destroys vampires and a few other types of undead, weakens others, leaves some untouched; most explanations involve the positive energy at the sun's heart to explain why candlelight has none of this effect, but this is not a very good explanation, given that we still don't understand why different undead types differ." Even Ristomaur Tiriac doesn't understand why, and he's plausibly the leading expert on vampirism on Golarion.

"I've never heard of positive energy before." 

"The fundamental essence of life, from which it is rumored souls are formed; clerics of Good gods can wield it to heal the living and damages undead, and there is also negative energy, which heals the undead and wounds the living and clerics of Evil gods can use."

"...Why would it damage undead???"

"Undead are animated by negative energy, and positive and negative energy symmetrically cancel out when they meet, causing the magic animating undead to fail."

"Why would one animate undead using negative energy. It sounds so much less efficient than using the thing that is more closely linked with aliveness to make things more alive!"

"Positive energy cannot - attach to the body? Interact with the body? Know what to give life to? after the soul has departed. Resurrection spells do channel positive energy as part of the same spell, after calling back the soul, to heal the body - or, at the ninth circle, build a new body around the soul - before it simply dies again. Negative energy can... if I say 'fill the space the positive energy has now abandoned' I am making several important errors but not, I think, critical ones; the intuitions it will give are reasonably accurate. You cannot use negative energy to reanimate what was never ensouled."

"...Huh. That's...does positive energy also not promote plant growth?"

"I don't know if anyone has investigated the topic. Not enough to matter greatly? Different spells are used for that."

"It seems like positive energy interacts with a narrower definition of vitality." 

"It does, yes. There are poisons it does nothing for, even ones that damage your health - specialist spells are needed for those." They're extremely useful dealing with adventurers who have clerics, especially if you're immune to poison due to being dead and don't need to worry about accidentally poisoning yourself.

"What kinds of poisons? Do they have anything in common?"

"- Ah, poisons it generally does nothing for, and disease. But the damage poisons cause, it usually cannot heal, separate from removing the poison."

"I could see doing nothing for disease, diseases are alive too--mostly--but poison doesn't have a handy explanation. Hmm. --Oh, just so you know, pieces of diamond that break off me while I'm not glowing are safe, but pieces that break off when I am glowing should be handled with care. Just waving them at people so the people get glowed at is fine, but, like, if someone tries to eat it, or shoves it into their body or whatever, that's really bad. It happened with a shard off my father once, and the guy turned onto an island, and everything on the island is alive. Separately. If you take money there the money starts screaming." 

"I see."

"Thank you. That's very useful information."