"And what do they go between."

"I am not sure I understand that question? Or if I can meaningfully answer."

"When you go through a portal, you are in a different place, yes? Are portals between any two locations, or specific locations? What locations have portals between them?"

"Ah... sorry, a lot of this is just background knowledge to me- Portals connects two specific locations in different dimensions. And pocket dimensions are related to regular space such that if you walk through a portal, walk two kilometers North and exit through another portal, you will find yourself two kilometers North from your starting point. In large dimensions portals appear to be randomly but evenly distributed. I can place portals to my dimension wherever I want as long there is space for them."

"But you won't be able to return home from there because you think you're spatially very far from home?"

Nod. "The immortality is really powerful and if it can't beat the distance between universes I don't think dreamshaping can."

"But you can access your - pocket dimension - from here?"

"I wanted to sleep to see if I am still able to create more of it, but I wouldn't expect to access the parts back home. ...I can create bits that coexist to where I am or expand already existing bits but I wouldn't be able to create a section of pocket dimension... on your moon without going there or expanding my pocket dimension until I reach it. I have a limit to how fast I can expand that is between 3 or 4 cubic kilometers per hour of sleep."

"...wow. And only you can access it?"

"No? I could close all portals, but by default as long they're open anyone can come and go... Is this about babies again?"

"Again?"

"Uh. I was talking to our hosts earlier and the topic came up. It's a species difference, humans don't have as much of a need to reproduce as you do."

"A pocket dimension sounds like the sort of thing that might help with population pressure but maybe not if it could be cut off at any time."

"I wouldn't be a jerk about it, but it's a capability that I would have and I could offer help some other ways. My dimension is pretty flexible about creating things and I can't unmake those. And there is also an ambient effect that makes fire not harm and consume things in there. I could make a power plant that does not consume any fuel."

"People can do lots of magic specifically within pocket dimensions they control?"

"It's idiosyncratic. Mine automatically does the fire thing. Some dreamshapers can pick traits like gravity or default weather and some can't add any variance."

"Is being a dreamshaper innate?"

"...No, but the means to become one aren't on this planet."

"Are they themselves magical in nature?"

Nod. "And dangerous. And pocket dimensions aren't always nice or cooperative. Some can produce monsters or other dangerous things."

Amentans look unimpressed. 

"What kind of technology does your world have," Afen asks. "Phones, internet, moon colonies..."

"Yes on the first two, no on the moon colonies."

"Have you noticed other things we don't seem to have here?"

"Not really, but I wasn't looking for it. I was assuming this was a pocket dimension. This looks like a fairly big city, even a bit futuristic, but not very different from Earth."

"What are all the kinds of magic you know about?"