Okay, then, here's the challenge: why don't you write something that conveys the same information in as little space that is not an infodump? Don't tell me, show me.

The point here is that there are different kinds of infodumps. You want to work in the fact that magic is operant to an audience that's already familiar with the trope, that's one thing. Depicting a highly idiosyncratic, historically contingent series of events is quite another.

As I said, I'm willing to be proven wrong, just show me how you would do it.