Planar Grid Theory

The Planar Grid Theory is a system used to organize a multiverse, which is referred to as the planar grid of the Mages Creation multiverse.The Planar Grid is a multiverse made out of three main things. The first of which are planes. These are separate universes, which can be traveled between via rifts or hole in reality. Planes tend to form clusters around one main plane, and are arranged horizontally on the grid.

The second are dimensions. These are caused when a major event occurs in the plane, which could lead to two very different outcomes. The plane will carry on with one outcomes, but a splinter of the plane will be created, with the other outcome instead. These are also known as parallels. They are arranged vertically, above or below planes. There are also higher or lower planes, often used to sort the dead and keep them in storage until the plane restarts its creation cycle and the souls can be used again. These are also arranged vertically over planes.

The third are demiplanes, otherwise known as pocket dimensions. These are smaller, and can be created by beings if they have enough ability. They are often limited to the imagination, and are much smaller than normal planes. They can be bound to certain locations and items allowing entry and exit. There are also corrupted planes, which are home to all sorts of terrible monsters, most often the void.

Planes will eventually stagnate, fall to civil war, or be corrupted by the void. These will (excluding the latter option) reset, with mostly the same rules, physics, and concepts, however there is a lot of change each time a planar creation cycle begins again. This does not count planar resets, as they are a temporary emergency state, usually to purge an outside threat such as the void.

There is the concept of planar time. Before the plane we exist in, there was a plane. After the plane we are on falls, there will be another plane. For example, the plane of Mages Creation (where the theory originated) comes before the Guardians' plane.