[He flashed a grin at Noctis.]

How should I know? I don't use magic but when your dad says 'here use this' I listen to him.

[So the chances are, it was just a smaller portion and they hadn't gotten as far past the theory stage as Tony had thought. He didn't have a way to verify that yet though and it hadn't been a priority so far.]

Anyway, about the design.. it's a surprise.