Someone smarter than me once pointed out that there could be a universe where magic is real only because there’s a group of people who have never had a magical incantation or action fail, purely by chance.

I liked the idea of that to the point that I went on to imagine that there’d be universes where that magic just suddenly stopped working one day because of well overdue regression to the mean and no-one there would have any idea why.

And then you could take that to the extreme: That one universe where the day they finally work out that magic had been random, incredible happenstance the whole time, only for it all to start happening again, just to mess with them.