Planes of existence

There are three known planes of existence:


 * Heaven
 * Mortal plane
 * Hell

Each plane hosts races such as angels, mortal humans and demons. These planes exist in overlapping dimensions but most think of the planes as being a stack with heaven on top, hell on the bottom with the mortal plane in between. With enough energy, beings can travel between planes but only in a particular order. To go from Heaven to Hell or vice-versa, one must travel first through the middle, mortal plane. It is theoretically possible, with enough energy to travel directly but there is no known account of anyone doing this. This design was a deliberate way for the Olympians to shield themselves from any retribution by the demons after the Great Division as it would require much more energy to go from Hell to Heaven through the mortal plane..

Because the planes overlap, locations in one plane correspond to specific locations on other planes. Therefore traveling between planes is essentially just phasing and does not affect the traditional four dimensions of time and space.

As one example, Ceraphina the angel was able to hear the prayers of Samuel the acolyte and speak with the dead souls of the mortals Euryale killed because she was located essentially in the same location (essentially around Townsville), just on a different plane.

History
In the beginning there was only one plane where immortal beings such as demons and gods lived with mortal humans known as the original plane. Peace was hard to come by as demons and gods competed for primal energy resources (typically among mortal races) in order to fuel the immortality of each race. In order to end the conflict, the Olympians split the planes into three using the energy they siphoned from the death of the primordial gods and titans. They then built a gateway at Olympus that allowed them to exclusively siphon heaven fire from the mortal plane reducing competition from demons.