Plane of Existence

A Plane of Existence is a region of space in NearRealm, the set containing all of which makes up the entire universe.

Each plane varies in properties down to a very fundamental level, such as: There are three types of planes:
 * being infinite or finite in size, and containing one or more distinguished layers
 * the flow of time itself, and any irregularities within
 * whether it possesses, and if so, the direction of gravity
 * boundaries between, connections to, and location with respect to other planes
 * its effects on the fundamental forces of the universe, and any presiding divine powers
 * etcetera
 * Outer Plane, Inner Plane, Transitive Plane, Material Plane