He feels an open summons and lets it grab him -
Now Ripper is wearing a motorcycle helmet and there is a motorcycle. Cam hops onto said motorcycle. Cam is not wearing a motorcycle helmet.
"Your magic is amazingly convenient."
They come to a house.
"That," sighs Cam, "is not my mom's house. If there is a tiny me he is probably not gonna be easy to find."
"Well, how else would you find him?"
"Probably via his parents. They're both public employees, it should be doable, just mildly complicated. Okay, back to the desert to make myself a little house."
Then Cam opens the front door. There is furniture and plumbing and two bedrooms and a prettily-carpeted living area, but he has neglected to include a kitchen, probably because he can just make food out of nothing.
"Cute place," says Ripper.
There is a bookshelf. Cam picks up a volume of the encyclopedia on it and starts flipping through it.
"Your magic is very science fiction."
"One thing I find really interesting about my magic, actually, is that it becomes so much more useful as more things about physics and engineering get learned. Hell is naturally an infinite empty void. Most demons live on a giant plane of solid gold that someone grew until it was big enough to exert a gee. It's extremely tacky. No one had discovered black holes or, like, gravity, at the time."
"Seems to me they'd discover gravity pretty fast at that point, wouldn't they?"
"There is actually not a lot of history kept in a written-down-and-therefore-conjurable-
"Huh. They don't share? Isn't sharing half the point of science?"
"In human culture, yes, absolutely. Demons pop into existence fully formed and adult, and when they aren't ex-humans, they don't even come with languages installed. Talking to each other at all took a while and might still be unpopular if it weren't for the fact that we tend to appear near other demons. Writing took a while, the scientific method took a while, and there's not much, like - improving the welfare of demonkind, motivation. We are indestructible and can all have whatever we want any time."
"The angels have a different result from a loosely similar background situation, admittedly - but they aren't quite as powerful, even if you give them a head start by supplying all the cloudy fluff Heaven is made of that they can use. Fairyland is way more interesting all by itself than a void or an expanse of fluff, but they don't have much good magic helping them along with the sciencing, they're pretty much just telekinetics."
"Your world's sounding stranger and stranger."
"Hey, at least we don't have vampires and a million kinds of demon, do your million kinds of demon do much science to speak of?"
"I don't know. Depends on the kind, probably."
"And if they do they're not sharing, at least with you?"
"I don't actually talk to demons all that often."
"You summoned one to clean your apartment but this isn't routine for you?" snorts Cam.