[Have you had more opportunity to consider perfect recall or any of the other possibilities for things-to-do-with-more-hexes? Would Kolya like to not need sleep, maybe?]
[Learn to speak Swahili or play the oboe or kick ass at Ultimate Frisbee or cook like a deity or do awesome parkour tricks? Make a neat magic device like my bike, only please nothing conspicuous because I don't want it to be too blatantly obvious to Libby that I'm passing you coins?]
[I would like some pentagons, please,] he requests. [I'll spend them all on languages.]
[Are you out? Sure.] She gives him twenty of those too.
[Learning languages with magic feels like cheating,] he reports, after another minute or two. [And the amount of magic a pentagon spends on who-knows-what is the same as the amount of magic a square spends on doing its actual job.]
[That's interesting... does a hex send a pentagon-sized amount wherever-it-goes?]
Bella sends him a hex, tapping her fingers on her knee with intent impatience.
Very, very shortly afterward: [Yes. And looking back at triangles, I don't think they spend any extra at all. But a square spends a triangle's worth of mystery magic.]
[That's very peculiar. I wonder what the mystery magic could be doing.]
[It's not contributing to the wish. Is it just... waste magic? Released to no effect at all? A natural inefficiency of the coining process?]
[I don't think so?] he says. [I do get a certain sense of... futility from it. But I'm not sure how reliable that impression is.]
[Futility,] repeats Bella. [So it's... doing something pointless? Doing a tiny amount of work towards an astronomical task? Doing something that will be undone?]
Doesn't go. Hex won't, either. Coins are not very good at directly learning information, or maybe they're not good at recursion.
[What would you need to look at to learn more?]
[I might need to watch more different people doing magic, in case it has something to do with the caster.]
[You can come lurk by the magic door and Alice and I can come up with stuff to do,] Bella suggests.
[Alice, what fun things can you think of to do with coins of various sizes so Lazarus can watch magic do stuff?] Bella asks.
They could always create a rain of jelly beans. Invisible jelly beans. And then clean them up afterward.
[Rain of jellybeans and subsequent cleanup is a couple pentagons. If you're low on fabric or anything this would be a good time to do some batches of conjuration. I think I'll add super-speed - to match my brain's version of same. And if we need something else I may want to gain the power to become insubstantial. And I haven't learned all the languages there are yet.]