Endosia

Endosia is the plane of transition, of in between. It can be reached without physically moving as it is overlaid at all times over the mortal plane. One need only be changing. So it is believed all things in any form of change is at all times simultaneously within this plane. The trick is to switch your awareness over to it in order to see it. Although some magics allow your body to be only within Endosia rather than overlapping, which allows one to move across Nucliosia through Endosia but removed them from being able to effect the other plane until they return to overlapping again. Such a trick would render you temporarily like a ghost of sorts, which is why Endosia is also known as the plane of spirits.

It is unknown what were to happen if something were to not overlap Endosia, to be in a perfect state of stasis and not change, for even stone is in a state of slow decay.