"We'd want some amount of privacy and maybe a 400 square feet of space. Oh and uh. Anywhere we used will eventually become a bit haunted - though it'll take a bit to be noticeable."

"...haunted. By what?"

"A general sense of unease and fraying of the fabric of reality. It takes a lot of haunting before it becomes an actual problem but I don't know of a way to unhaunt a place yet." 

The fabric of reality here has had worse.

"In that you're okay if we haunt a bit or that it won't get haunted in the first place?"

Either, both.

"Well, worst case we can add stories if the ground floor gets too haunted, I guess."

"What form does the fraying of the fabric of reality take? On, uh, normal planets that aren't Milliways."

"Makes it easier for certain sorts of entities to break through, can mess with topology, if you spend too long there you might go mad, that sort of thing? Uh, if you keep going some texts say it will eventually collapse into a raving dimension of mindless hate and chaos but I've never manage to find anyone who can operationalize what that looks like."

"...wow. Is 'go mad' operationalizable, like, what kind of mad."

"Uh, I've seen obsessive fear, someone who wanted to eat everything, a guy who wanted to blow up the Earth for reasons I don't understand, someone who tried to have their family reenact the lives of the people who last lived in their house, and probably some other things I'm forgetting?"

"...wow, you've only done the resurrection thing two times, are there other spells that also hauntify stuff or was I way off in understanding how quickly this happens?"

"Oh these are from other people doing different spells that hauntify things. It would take thousands of uses of the resurrection ritual to even get to the growing sense of unease point, and way longer to get to the madness point."

"Oh good. I'm actually optimistic that if we get one Maia, or the right one anyway, they'll be able to do the rest of the work."

"Huh, how?"

"They're magic too."

"In a ressurectioney way?"

"So, the dead ones are actually in a - complicated physics situation. As good as dead, but possibly recoverable with magic that isn't specifically resurrectiony."

"Ah, which presumably won't apply to helping with people on my world."

"I wouldn't guarantee it couldn't but it'd be fraught since they will probably be very upset that I murdered them and might have their own opinions about how to approach anything in your world."

"Ah, how reasonable are their opinions likely to be?"

"I don't know, which is why I'd like to get all the dead resurrected first - there are probably some humans and also Dwarves who I'll need your ritual for."

"Are they likely to interfere with resurrecting people from my world too?"

"You don't have to let them in if they can't convince you of their benign nature. But this might be one reason to teach me the ritual so you never have to be in the same universe with them at all."

"Are they likely to notice if my world is using space elves as intermediate steps in the resurrection ritual?"