It doesn't seem he knows for certain huh.
However, I'm sure it'll become some kind of clue.
Until now, Nanahoshi has only ever drawn magic circles with a single plane.
If she were to layer them, I guess such upside down ways of thinking never came to her.
Or else she might not have tried it for some other kind of reason.
I'll be praying that this talk was a blind spot on Nanahoshi's end.
And then, it would be good if she'll regain her motivation.