They are invisible! They are in the hills! He sets to circling so he can illusion them convincingly.

Aya picks out a hill that is not particularly visible from the city but presents a reasonably doable walk thereto.

He layers an illusion of the hill exactly as it currently looks from a lot of angles over the hill. Then he teleportation-excavates the hill into space and puts in the foundations and then puts in a shiny soaring underground fortress-place with enough concrete supports for all the dirt that's going on top of it and then he layers more concrete for protection against unknown magic that could do bombing-like stuff and then he puts back the grass and the hill. 

And he teleports them in. The ground is like the palace in Tirion from an era later than his; ink-black with stars, like you're walking on the night sky. The ceilings are in black marble, lit with fixtures behind the walls so the light is nice and diffuse and glowy. 

"It looks a little bit like an evil palace," he says, "but an awesome one."

"...Is there an exit? I can't teleport, personally."

"I can make you a necklace but it'll take me a while. Exit's over here." Right through the illusion of the hill, on the side not facing the city.

"Okay, good. Wouldn't have suggested being near town if we were just going to teleport in and out. How long will it take to make a necklace?"

"I haven't done it before, but the computer has estimates -" he looks it up - "estimates that one at 2000 hours. So probably the thing to do would be to use the perception-speeding song, at the full acceleration where you don't want to drop out of it because it's really disorienting, and then not sleep, and then it'd be three weeks."

"You won't burn out or anything, doing that?"

"I'm a Fëanáro, we're kind of workaholics...does that translate? Anyway, I'll be lonely doing that but mostly because I'm lonely missing my family. It took me - I don't know the local years - the length of time it takes a human baby to grow to look older than me - to get the interdimensional teleport for Boots and at the end I was fine."

"It translates. All right. It sounded like you'd still be able to exchange notes and make stuff outside your perception-accelerated area while working?"

"Yeah. You can write me letters telling me stuff you need - or just in general, I like getting stuff to read - and I can write you back and I can make stuff anywhere I can see."

"Okay. I can spend three weeks reading up on politics and the slave economy and suchlike."

"Cool! The complete works of this world are on your computer, and there's a search function, I can show you how it works -"

"Yes please."

Here is how the search engine works, and he has the keyboard configured for the alphabet she's familiar with by now. He bounces. "There you go!!"

"Thanks. Anything else I should know before you hole up for three weeks?"

"Probably lots of things but I don't know what they are -" Hug?

Hug.

"I'll probably teleport out sometimes. Moving's really frustrating when you're that accelerated but teleporting's fine."

"What will you teleport out to do?"

"Just be somewhere other than right here? Look at pretty places in your world, maybe."

"If I think of any that are particularly nice I'll let you know."

"Thank you." And he unwraps himself and makes a desk with large pretty high-definition monitors for his chip-locked computer and gets the instructions and then puts on headphones with the stacked perception song. The headphones have to be spaced like so for the magic to work; they look a little ridiculous.

Little bit. Aya explores the palace and then sits and reads. Periodically Epic receives meal requests and little book reviews and, once, a lovely drawing of an embroidered birdlizard.

This is nice of her. He writes letters to Boots every objective-day. They are a bit boring. "Did another thirteen segments of the necklace enchanting. I think your alt is happy. Mostly because Bells are happy if you show up and dump magic on them, it's hard for me to guess if people are happy by looking. I am sort of tempted to drop a thousand ball bearings into a magic and teleport them out and see if any of them are stunningly useful or something. Tried another few ways to check if Aelare exists, didn't come up with anything. If you guys figured it out I will be annoyed and jealous."