The Infinite Plane.
Infinity is a big concept to get around, in a very literally fashion. Contrary to popular misconception, it is not a number, is a name for the concept that there is no limit to the numbers that exist.
While infinity has all sorts of properties for mathematical purposes, this is neither the time nor place to discuss them. What matters for our purposes is that when you are dealing with infinite things, nothing is truly impossible; it can only get rather improbable. And of course, the best stories are not the probable, predictable ones, but the ones that no one sees coming.
It would be literally impossible to chronicle the whole of the infinite planes; even a compressed, abstracted version of infinity is still infinite. So this document doesn’t even pretend to try; all that it’s really after is the interesting stories.*