Basically, the world consists of 3 dimensions: length width and height. Of course, anyone who took basic math knows that. What most don't know is the other three dimensions: Assiah, Gehhena, and Heaven.
The dimensions
Assiah is the material world. It is very similar to this world, but the only differences are the connections.
Gehhena is the world of demons. It is a place of death and destruction. Demons from Gehhena can reach Assiah by possesing material substances.
Heaven is the world of angels. Angels are the servants of all. They normally don't reach Assiah. It is a common belief that after death, you go to heaven...
Fallen Angels
It is possible to be transformed from one being to another. A fallen angel is the name of a specific type of demon. If an angel breaks the law, their wings are cut off and they are sent to Gehhena. There, they are incinerated by the flames of h* until becoming demons.
As of now, demons cannot become angels.
Humans cannot become either angel or demon.
Other Vocabulary
Archangel- The highest class of angels
Connection: what connects and allows travel between universes
Heart- A demons heart is the weak point. It also draws out the true power.
Hybrid- AngelDemon , only possible in labs
Hybridon- Human Hybrid, only possible in labs
Nephilim- DemonHuman
Polygene- AngelHuman
Sealing: when essence or heart is trapped in an onject
Universe/Dimension- A world with its own rules