On the Table of Fate
Planes of Energy
The planes of energy represent the most fundamental aspects of existence – creation and destruction. The positive plane is the source of all energy, life, and being, while the negative plane acts as its balance – a sink for all energy and matter. Existence is impossible within either plane, as a balance between creation and destruction in necessary for life to exist. A being from Annwn placed within the positive plane would be incinerated by the infinite energy therein, while that same being would crumble to absolute nothingness if placed in the negative plane.
Where these two planes meet, however, they create the plane of shadow. It is within this infinitely thin layer between absolute being and utter nothingness that all life exists within the multiverse. Planar scholars believe that infinite realities exist side by side along this plane, which can thus be thought of as an infinite series of unending lines placed beside one another. Thus, while exploration of the plane of shadow can continue indefinitely in one direction, linking a world to the elemental and outer planes, exploration in another direction is thought to lead to other prime material planes, existing side by side with our own. Of course, no being is known to have breached the shadow plane in such a fashion, and theories of alternate worlds beyond our own remain as speculation.