Maya notes them.

Theo examines his skin color to make sure it's accurate and not just 'vaguely white' or something.

It is in fact accurate!

"Okay so you had some reserve mana—can you use the Sword again?"

… He tries! He throws the card out in front of himself again and attempts to summon the Sword.

The card doesn't even do the floaty thingy in front of him, when he throws it it just flops to the ground like it was a—well, a card.

"Okay, so, need mana to even have the card float out in front of me," he says, picking it back up. "Makes sense, I guess."

Also noted.

"Juniper, Theo, and I are all out of mana, then. I wonder if we can give numbers to this..."

"Well depending on how quickly it recharges, we could try doing a single spell as many times as we can after twenty-four hours after having totally drained our supply, and if it's a meaningful number, write them down and keep track of how much we can do after certain amounts of time? Such as, the short flight thing, you could see how many times you could do that, or instead see how many times you can inscribe a piece of paper with 'wind' before you get the weird effect?"

"And we probably have different capacities, too. This is going to be very time-consuming."

"Yep. And they might vary over time or with the weather or something, as might the recharge rate, and we might get fluctuation because spells take different amounts or something based on environment or they might take less if you do them a bunch or there might be differences between us for different spells, but it at least seems to be a mana thing."

"Okay. This... is kinda really exciting?"

"It kinda is! It's also slightly frustrating because it's probably going to require lots of data that we don't yet have, but yeah."

Theo smiles.

"Well but we can presumably collect it all."

"Yeah, hopefully! And depending on how quickly things work– I mean, I don't want to seem too ambitious, but if we can change ourselves to be slightly younger then it's possible that we have, in theory, a really long while to do it?"

"...which makes me wonder why Clow died at all."

"Clow lived for over three hundred years before deciding to go on."

"… Did he get some sort of weird brain disease that made him hate living or something?"

"...I don't think so?"

"Okay," she says. "I really doubt I'm going to do that anyway."

"He said it was time for him to go on, and that we'd eventually find a new master."

"Uh-huh," she says. "I don't much like the idea of getting to three hundred and deciding to move on, and I doubt I will choose to do that, but who knows, maybe I'll have a change of heart in my third century."

Shrug.

"...yeah I'll trust three-hundred-year-old me before I trust Clow on that score. Although, do sorcerers typically die that, erm, age?"