Prologue: Voided Death

People all should die when their world ends and returns to nothing, but when you delete something there are always fragments left behind. The multiverse doesn't have a defragmenter like computers do, so the pieces must go somewhere.

First layer of reality: physical world
Second layer of reality: spiritual world
Third layer of reality: the boundary between realms/worlds
Fourth layer of reality: the Void/ original nothingness

Fifth layer of reality: the surviving scraps.