"Academic and ambient magic are very much different kinds of things. Before people knew a lot about ambient magic - and sometimes even afterward, if no one who knew about it was around, or if it was a rare kind of ambient magic - people used to mistake it, the natural magics especially, for the work of spirits or elementals. And sometimes craft magic just looks like ordinary talent, and craft magic breakouts can look like ordinary accidents. Academic magic has signs almost everyone can see, but ambient magic usually isn't obvious to anyone but ambient mages, and often not even then."
"Are there actually spirits around doing things that look like magic?"
"Sometimes. Spirits do exist, although we don't know as much about them as we might like. Under most circumstances, it's hard to tell they're there because they just go around doing the same things their natural phenomena were going to do anyway - the tide comes in and goes out, fires burn, winds blow, rain falls. The earth stays still, except when it doesn't. But sometimes a spirit gets attached to or tangled up with a person somehow, and then you get a person who makes natural phenomena behave strangely around them, and that can look similar to ambient magic, especially uncontrolled ambient magic. Fortunately, possession is even rarer, and these days we understand ambient magic well enough to realize that it's not the same thing at all."
"And Mathilde made sure I'm not attached to a spirit, that I'm really magic?"
"Yes. Mathilde can tell you are really magic, because seeing and understanding magic is one of her many specialties."
"A magic breakout of any kind is when someone does magic by accident, or without understanding and controlling it. When you saw the magic-checker, he probably asked you or your parents if you ever moved objects without touching them, or saw or drew pictures in fire? Those are two of the most common breakouts of academic magic. Almost all children with that kind of magic do those things. Weather breakouts include raining indoors, sudden winds, lightning striking nearby objects... my magic breakouts tended to make flowering plants bloom whenever I walked by them, which sounds very pretty but can tire out the plants if it keeps happening. Part of the point of teaching magic is to stop the student having breakouts, because they're usually inconvenient and sometimes dangerous."
"I've had indoor weather happen sometimes. I don't anymore, though."
"I didn't like having to keep my notebooks boxed up, or breaking the plates. And nobody else likes lightning up close."
"...If you ever have lightning around that you don't want you can just give it to me, if you can?" offers Stormy tentatively.
"...I'm not sure I know how to give lightning to people," says Niva. "But if I could, definitely."
"It's the building in the very centre of Winding Circle, where food is cooked and magic is done!"
"Is the magic mostly done to the food or do you mean something else?" (She takes a second helping.)
"The magic is mostly not done to the food. It's just convenient for all the food to come from the middle, so no one has to go farther than halfway across the circle to get it, and for similar reasons it's convenient to do some kinds of magic there."