Sadde's running.
Not for any particular reason, just because it's faster. He's been meaning to go to one of the capitals for a bit and now, he supposes, is as good a time as any.
And eventually he's not running anymore, because he's close enough to civilisation that someone might spot him. Not that he wouldn't be able to notice them by scent before they saw him, but still. And as he makes his way to the Norway capital at this more leisurely pace, he notices the tiny, shiny key. He walks towards it and picks it up and immediately notices just how magic it is. He can tell by the way the key feels like things, and different things depending on where it is.
He verifies that what the key feels like is consistent in absolute location by waving it around a bit and seeing that the same place always feels the same. "Huh," he murmurs to himself.
He straightens up and thinks. The first obvious thing to try is seeing whether it opens any doors—a universal skeleton key sounds like the kind of thing a magical key could be—but the second obvious thing can be tested right there and then. He pushes the key into thin air with some purpose, as if he wanted to unlock an invisible door, and then turns it, et voilà, the faintest of door-shaped outlines appears before him.
He locks the door, and it disappears. Unlocks it again, and there it is. So he pulls it open and sees—
"Let's see, what other tests are there. Trying to summon you from another universe but we should wait until we're sure you're not receiving any other summons while technically-summoned, there's still in theory a chance these portals close themselves after a while but we have no reason to believe that anymore... Is there a good reason for me to try summoning fairies and angels here?"
"It would be interesting. But I'd want to do it someplace without a view and not let them out of the circle to avoid premature publicization that this isn't just a house on Earth somewhere where they were summoned."
"As long as we're trying wacky things could look into summoning Limboites, probably won't work but if it did it'd be amazing."
"Right, I was thinking about that but haven't really come up with anything plausible. I do wanna explore your circles a bit more, though, like that 'used up' part, and see if I can't find any principle we'd be able to generalise to summon Limboites that no one did for daeva..."
"...I'd like to verify that time passes at the same rate even when there are no portals. Put a clock through, close and lock portal, re-open."
"Well that one's easy to test right away." He opens a door, a few metres above a cold desolation.
...Cam attempts to make the clock in the desolation without passing it through.
"Yup." He closes the door and locks it, waits five seconds, then unlocks it again.
"Looks synced. Can't necessarily count on it, but at least it's not habitually at some ridiculous multiplier."
"It just occurred to me that we don't actually really need to wait until your being-summoned test is done, I could go to another universe and try to summon a different daeva from there."
"You could, but that can be dangerous if you don't know what you're doing and I can't think of anybody I expect on a personal level to be uncurious and without any interest in messing with you."
"I did read all your notes on the subject, and you could conjure me a book on summoning if you're worried, but what could they do?"
"If you say something agreement-like without hashing out a proper task-and-payment they can accept that."
"If your daeva cares to run amok you are best advised not to casually go 'yeah' or 'mm-hm'."
"Okay, I can remember that. I mean if you'd still rather wait, we could start setting up summoning the other types of daeva here, and I could then start doing tests on the circles."
"Sure. Lemme look up a suitable angel. And I can do the talking as long as I'm here." Compute compute.
"No, I have notes on individual summons I talked to - separate from the project notes - and also daeva I've met through my own summons."