He fixes his expression in a deep frown as Fox shrugs off his concern and launches into his theorizing. It's similar to the way Five would dismiss someone who dared to question his work, except he doesn't usually have the patience to dumb it down for people who won't understand. Fox seems the opposite, prattling on with the assumption that it all makes perfect sense to both of them.

When he starts talking about spells and crystals he stays silent, mostly over the fact that the concept of magic is still foreign to him. Five's abilities are deeply rooted in logic, in complicated equations that he solves whenever he makes a spacial or temporal jump. What Fox does is in another language, and not knowing how it works bothers him more than the possibility that it could be a solution.

At one point he scoffs and shakes his head. All he can picture is a handful of shattering gems, and he scolds himself for getting too invested in the easy way out. His sister blew up the moon, they can't just throw something at the wall and see what sticks.

"We're not going to be testing the max power levels." If they get to that, they're already dead. He seems to realize that might be telling, so he follows it up with another question. "Who controls it? Does it work by proximity or is it something she'd have to consciously focus on?"