A being known as Dea is the creator of all things in the mortal world. It created human beings as living batteries in order to fuel him and give him power. Dea feeds off of human worship, which it uses to get stronger. It is the source of all religions in the world, both monothiestic, polytheistic, or otherwise. It gains power anytime humans pay homage to any god, irrespective of creed or type. Christianity, islam, hinduism, etc, all fall under his domain.
As time goes on, the world becomes more populated. The amount of worship from humans increase and makes this god stronger. Eventually, Dea conducts a rapture like event which ends the world. During this rapture, It consumes the souls of human beings, both living and dead. All humans ascend to this being and become a part of it, existing everywhere and nowhere at once. The world resets itself and Dea re - seeds the earth with life. This process occurs every few thousand years. When the humans become part of Dea, he gains all of their knowledge. This means that it knows what drives them to worship him, so it can remake the world in a way that makes them more eager to worship him next time around. When Dea re-seeds a newly created planet with life, it introduces new features to the current iterations of humans to improve upon the last version.

We humans are the most recent incarnation of the human race, similar to the latest, up-to-date software on our computers. Dea draws power from multiple worlds across the universe/parallel dimensions and can survive without the worship of one of such worlds. Dea needs this small amount of additional power because It competes with other beings in an eternal game to control the rest and their spheres of worship in the multiverse. Only a certain amount of these spheres can exist because power gained through worship increases with the intelligence of the beings worshiping. If two worlds of these intelligent beings are too close to each other, they will figure out about each other, and therefore might be able to figure out the presence of the Creators when another world gets destroyed, and stop worshiping the creator.The beings could also become Creators by gathering the worship of another world that are less technologically advanced than themselves and take spheres of worship for themselves, making all other Creators have a worse chance of winning.