"I don't think so."

"Does magic ability vary with the weather, maybe it's just less today and Theo just can't see it?"

"I don't think so? Clow's never changed."

"I wonder what it is, then."

"You're sure you saw a spark that day?"

"Pretty sure, yeah?"

"Okay I have no idea, then."

Theo shrugs.

"Potentially unprecedented disappearance of magic," comments William. "Sounds like something fun to look into, I suppose."

"Hypotheses, anyone?"

"It was some magical parasite and not me, magic can spontaneously disappear, someone stole my magic?"

"—are magical parasites a thing?"

"I've never heard of any."

"It might be possible to make one, if we wanted to."

"So, not necessarily ruled out but not the most likely thing – Kero wasn't hiding behind me at the time, was he?"

"No."

"It sounds like – foreign magical object, magic disappears over time, or magic got stolen, are probably the general things it could be? With foreign magical object seeming unlikely, magic disappearing over time being unprecedented, and my magic being stolen being worrying and also unlikely?"

"Magic being stolen would be really worrying, but I think it doesn't quite—fit? The things Kero's said about sorcerer clans and such?"

"I don't think I've heard much about the sorcerer clans," says William. "Is it that they wouldn't, or that it sounds like they can't…?"

"Well it's more that they exist? Like, why would they, unless magic was heritable and hard-to-impossible to obtain otherwise?"

"They might not have many members amongst them, and may not trust outsiders enough? I don't expect it's particularly likely they'd steal a spark from me, instead of going after someone else, though."

"Yeah, oddly disappearing magic sounds more likely."

"And also unprecedented but with a sample size of – not very many?"

"Everything here has a sample size of not very many, maybe we should go after all these other sorcerers."

"It sounds like it might be good to establish contact with them," he agrees.