See the creation section of the mythology page.
The world of Byakti is separated into two realms, the Living Realm and the Magical Realm, each with their own history:
It should be noted that "Byakti" is often used interchangably to talk about the Living Realm, the physical world, or even the greater universe. If the planet that comprises this world has a name it would be Byakti, however, since the sundering both the Living Realm and the Magical Realm exist in a sort of pocket dimension that doesn't quite corrispond to an actual physical planet.