"...Hi! Who're you?"

Idaia, I'm assuming your roommate doesn't speak Quenya, is she going to be alarmed by subtle arts?

Startled, possibly, alarmed, no; she does in fact know a handful of words of Quenya but not enough to reliably communicate with.

So, on the assumption that the Quenya is basic stuff, Bella says, "Hi," and Sorry, I don't speak your language.

Hi! How did you get in my roommate's closet or was that temporarily a doorway to Narnia? Implication: literary reference to a transdimensional portal in a wardrobe.

...second thing.

Cool.

Yep. Anyway I have useful magic and I used to live in a Valinor and my world is horrible, so I'm moving to this one.

Welcome! Idaia must have been thrilled to meet you.

We have a lot in common! My name's Bella, nice to meet you.

Daphne! Nice to meet you too. Are you also going to try to cure aging, I was going to help her with that.

That's the plan. I will need a little while to settle in and get used to the idea of being a wizard again and reconstruct my research, but I think I'll be able to get somewhere with it.

You have magic too? Excellent, what's it like?

Are you looking for a list of effects it can produce or information about the spell design or casting process?

Little of Column A, little of Column C.

My world does not have science - it is literally impossible to practice usefully - and we have a standard of living that I think is close to what you have here in most respects. That's mostly wizardry, some divine magic. When I was doing serious wizarding I could fly and speak to people across oceans and heal and enchant crystal balls - She gestures at her crystal ball - which are networked and share content people put on them with each other, and a bunch of other stuff. Casting takes mana, which people have a finite but rechargeable amount of, and at first it's pretty rigid but with practice you can freeform a lot of the pieces of the spells and combine them in new ways.

No science? Ugh. Kudos on the magic computers though.

You have science crystal balls?

Yep!

Cool. Maybe I can make them cooperate.

Maybe. I don't know nearly enough about either one to guess.

I will have to find out. That's what living in a science world is for.

Science is awesome. My specialty's the science of living things, though, I know how to use a computer but not how they work.

Maybe you can help when I'm working on expanding the healing spell in the anti-aging direction, then.

Sounds brilliant.