At the beginning, there existed a god. The god did not had a name, it was pointless. There was nothing where he lived, just nothingness, the concept of time and place didn't arrise yet.
Suddenly, he started messing around, moving himself, and playing around, during this, he noticed something, he had powers. The power of Creation and Destruction. He started messing around with them. With Creation came The Universe. With Destruction came The Void.
After looking around the things he created for a long time, he wanted to make something moving with its own will. So then he created 3 Beings, one with creation and destruction, one with creation and one with destruction.
He wanted them to have a name, so he called them The Goddess of Life Exodia, The Goddes of Death Inxophus and The Maintainer of Reality Mear.
During their creation, he did not know how to grant them the knowledge of a higher being creating them, so when they were created, they didn't know him. He grieved for a moment, then suddenly his sight started becoming fainter and fainter.
This was the first time this had happened, so he gave in.