Deuddegwynebir Expanse

The Deuddegwynebir Expanse is the name for Heaven, Hell and everything in-between. It exists as multidimensional state that fills up every corner of every universe. Currently, only five realms are known.

Name
The name is a literal translation of the Greek word Dodecahedron, meaning twelve-faced. Deuddeg meaning twelve and wynebir meaning faced.

Realms
Each of the twelve faces are a different dimension, or realm that exists.

1 - Heaven
Heaven is the abode of the Lord and where the spirits of the Good go post death.

2 - Annwn
Annwn is wrongly attributed as Hell, but rather is the version of Heaven for those who served as Ceidwaid. Due to the nature of the job, they can never enter the true Heaven.

3 - Arallfyd
Arallfyd is the dimension in which every planet receives its elements from. It can only be accessed on certain Worlds. Arallfyd in some cases, tend to stretch the world they're on in order to fit with the pre existing geography. The one on Earth is roughly the size of Finland, and has stretched the world accordingly in order to fit.

11 - Tirhedu
The Land of Darkness. Tirhedu is a place created to torture the Ceidwaid by forcing them through a series of horrid experiences causing mental torture and physical damage.

12 - Hell
The domain of the Devil and all Demons. This is where the spirits of the damned are cursed to spend eternity.

Other
Inside the Expanse are two additional 'realms'. These aren't considered as actual realms but still hold great importance.

○ - Mortal Plane
The mortal plane - also known as our world - is located in the centre of the Expanse in the shape of a sphere. Inside the sphere is the universe as we know it to be. It is said that the mortal plane is located in the centre because it allows for travel between each realm.

∞ - Void
The void is a nest of dark matter that separates each realm from each other. As this isn't technically a realm, Satan's influences run free and the void plays host to his machinations.