"That ultimately requires that Tialle's Demon also be able to summon, it sounds like, but yes."

"Or any other trustworthy person. In my world only humans can summon, but there aren't any Tialle's Demons around to try it, so I don't know what to expect there.""

"If we go with someone who will themself die, we'll need a succession of trustworthy persons to replace each other as they age and go from summoners to besummoned."

"Yes. I think that's probably a tractable problem, though."

"More convenient and less of a risk of discontinuity to just have a trustworthy immortal. The more people we have to trust our well-being to the more likely it is that one of them will be a mistake."

"Yes, but if none of the immortals you find can complete valid circles..."

"Then we go with the less preferable higher risk option."

"Yeah."

"Anyway, we probably wouldn't have to go on like that forever, we can...keep...I'm an idiot, we'd only need to be summoned the once."

"I mean, if your summoner dies you're unsummoned instantly."

"Yeah, no, but we have interworld travel. At least as long as I keep my magnetism, anyway, we can just get our travel devices back and then be unsummoned and then come back the usual way."

"Sure. If they work in the daeva worlds."

"Why wouldn't they?"

"I don't know, I have no information on how your interworld transit behaves, maybe summoning or concordances or something would throw it off."

"Enh, it's handled some pretty weird stuff just fine, I wouldn't worry about it too much."

"Okay. ...In that case, if you manage to get interworld transit working between the daeva worlds, I would like to be dropped off in Limbo."

"Okay, why? Actually what is limbo, I don't think you've explained that one to me."

"It's where dead non-summoners from my mortal world go. It is sort of okay. It is not great. One helpful demon would go a long way."

"Can you summon people from there? I can get to anywhere I've put down markers, but the markers need to get there, otherwise I can only go to near-random universes. I could probably get to Limbo if I put in enough effort narrowing down its dimensional coordinates..."

"No, you can't summon Limboites. But I could mail a marker to Limbo, during the next concordance - it's a few years off."

"That'll do, then. You'll have to give me a good time to expect it to arrive, though, I'd hate to interrupt the mail."

"The next Hell-Limbo concordance is in... I think six years, I'll look it up." He materializes a computer. He looks it up. "Six years, two months, four days, Earth time. Concordance lasts less than a day, and after that the package will be in Limbo."

"I meant that I or someone else would summon you closer to that time and you'd let me know how long it was likely to be in transit."

"The concordances are quite predictable. I don't mind being summoned in the meantime but I can get it on its way in a few hours of time-in-Hell."