"How did these items get made if there's no way to learn magic? Are the magicians homeschooling their children and not writing any books? How did you learn?"
"Half this stuff is antiques," says the shopkeep. "Look, asking me a dozen times isn't gonna make the answer more to your liking. I don't have Hogwarts in the basement, deal with it."
"But where do you get the stuff that isn't antique - who made the Avalon itself? - isn't anybody panicking about the medallion supply? -"
"Kid, nobody knows how to make medallions."
"But some people apparently know how to make luck charms and protection amulets!"
"I'm not going to give out my suppliers' personal information. I wouldn't do it even if you weren't annoying."
"There have to be books -"
"Does this look like a library to you?"
"If there's anything wrong with it, neither of us could tell after looking it over independently and then conjointly."
"Oh good. Because I wound up staying up really late last night and finished an entire diagram with my starting rune."
"That's probably a good thing, I wound up nearly falling asleep in my first class this morning. I need double-checking." She hands over a spell diagram.
He double-checks the spell diagram. There is one minor error, probably the result of fatigue.
She goes back to her scratchwork around when she placed that rune, finds the root of the problem, rederives that layer of proscription, crosses out her mistaken diagram, and writes out a new one with the error fixed.
May hands over the incantation, which is a stilted but grammatical translation of the one in the book.
"It could stand to be a little less, uh, stiff, but it's perfectly grammatical as-is."
"Here goes nothing."
And she incants.
And she vanishes.
Kanimir times her! He does not have a stopwatch and will just have to do some arithmetic based on his analog wristwatch. That's okay! It works!
May remains invisible for twenty-one minutes. During which time she slides invisibly into Kanimir's lap to kiss him, just 'cause.
This is startling! But good startling, even if his sister is going to tease him later for the noise he made.
"I diiiiiid iiiiiit," she sings when she resumes visibility, wriggling happily. "And that's long enough to do some decent flying, too. We'll see if yours gets better duration."
It takes him another while to finish it up, and then submits it to May for approval.
She doesn't find any mistakes in the construction - his was not completed at three in the morning - but she does correct a couple defects in the lines themselves.
Poof. Gone.