9S' experience with magic amounts to a grand total of zero, if you don't count what people have shown him at the Carnival. So he doesn't have much input on that. He does, however, have something to say about the new words, after taking it his own and glancing over it.

"A ball? What's that?"

Somehow, he gets the feeling it isn't a spherical object.

"Something is probably going to happen then, right? What? And why wait until then?"