"Nice if you can arrange it, yeah."

"Why can't you?"

"I guess I could now but the need to talk to people has diminished recently."

"Sounds like a story."

"It is a long story."

"Well, time's apparently paused on the other side of the door."

"You really wanna know?"

"Yeah."

"Short version, I'm on summon to a world where summoning does not otherwise work. Could be dismissed, can't be resummoned. My summoner's in hiding because somebody might kill them to get to me. There was a war. I ended it."

"...Huh. If summoning doesn't otherwise work then how...?"

"Not sure, I may've been a fluke."

"Well, I'm on a summon to another world where it works pretty damn reliably, to the point where someone invented trans-world summoning just to make demons easier to pay. Got any advice on war-ending? It'd be pretty useful."

"Not especially. Circumstances unlikely to match. What's your world like?"

"Well, millions of years ago there was a sentient species that looks like lizard-kangaroos, and now they're extinct outside the daeva realms and limbo, except for fifteen catatonic summoners that have been kept around all this time."

"...wow, okay. That's gonna be fun for the library of Hell curators."

"Currently there are, as far as I can tell, three inhabited planets. One of which is also Earth, for some reason, complete with humanity. And one of the catatonic summoners--the one of the worst of the lot, the one we're trying to evacuate people away from--is inside the Earth, surrounded by explosives rigged to destroy the planet if the setup is messed with or the summoner dies."

"...duplicate Earth? What the fuck?"

"I don't know."

"Circa when?"

"Which, it existing or containing a catatonic summoner?"

"I mean what's the calendar year on the Earth."

Pretty close to the one on theirs, but not exact.

"They have their own Revelation?"

"Yeah, why?"

"I'm Revelation."