"That—would have been a good idea, yes," says Legend, who has known it was Epic all along but has to play this part and it's kinda terrible but okay, "but in any case, starting large-scale projects on visible celestial bodies without warning anyone can frighten people really bad, there was even talk about how this could be a Russian ploy, or an American ploy, depending on who you ask." And he gives Hero a pointed look, since, well, Hero should know better.

Hero manages to look appropriately sheepish despite the mask.

"Sorry. We went to another galaxy first to check if powers still work there. They do."

That they failed to catch.

"Why were you checking that?"

"Containment of prisoners. Some magic's local to a planet, some's local to a dimension, some has an adjacency limit - if we had somewhere where powers don't work we could just build a nice place for parahumans who can't be deterred from murdering people there. Different dimension still might work but different galaxy doesn't."

"—well have you tested a different dimension? That could be potentially very useful."

"I haven't, jumping dimensions at random is dangerous in case the local magic system interacts badly with something you've got, there's a small chance I wouldn't come back. If you have anyone who can breathe in vacuum and who wants to try I can tell them the risks and then they can jump and write a note saying it's safe and I can go and get them."

"I technically could, and so could Eidolon. Library of Alexandria could hold her breath for long enough and survive in a vacuum."

"...except that assumes powers work in adjacent dimensions, which is what we'd be checking -"

"Oh, you meant arriving in a vacuum in another dimension. Were you thinking of breathing in a vacuum through technology?"

"Can't you go to the dimension you were in immediately before arriving here?" wonders Hero.

"So that's the thing - the dimension I thought I was in immediately before arriving here was Warp, the one I live in, but I can't get back there from here, I think I somehow jumped two dimensions at once."

"And if you hop to a random dimension you won't be able to come back? Or do you think you could end up hopping two dimensions again?"

"No, I was using a prototype worldleaper and I can just use the normal ones. But there is at least one dimension that is unfriendly to external magic and technology, breaks it all. There might be others. There's probably a 99% chance I'd be fine. But if I landed in a bad world I wouldn't be able to come back."

"Can you teleport equipment as well as people with these worldleapers?"

"Capacity limit's pretty low, but it's not zero."

"How much information do you need to conjure objects? Could you do it from blueprints and plans?"

"Easy."

"And how low is your capacity, exactly?"

"Can't take a spaceship with me, could take, like, a couple people or equivalent amount of cargo?"

"How about a person and, say, a suit that could resist space for long enough for them to write you a letter?"

"That'd work fine. They'd 99 percent be safe but that's not for sure, they should know that -"

"I'm sure we could find someone willing to bet their life on a ninety-nine percent chance of being able to secure the likes of Gray Boy permanently."

"Okay. I'll make you a worldleaper and you can see if powers have a dimension limit. Or an adjacency limit. Most stuff has one or the other."

"How would we test the adjacency limit? Can you target specifically away from a given dimension?"