Kate: So! Tell me about this null barrier thing then! I know a bit about magic, though, I still can't see this magic you say Phil has myself.

Yuki: Well, it's a unique mixture of all known magics causing an inverse reaction. Basically, a thin layer of it could totally seal off our universe! 100% protected.
Theoretically.

Kate: I see. Funny enough, probably lucky you didn't discuss it with Phil. I know what he would say.

Yuki: Oh– And that would be?

Kate: "That's just like this D&D thing called Crystal Spheres–"

Yuki: Ehh–Yeah. That sounds right.