[OP: ]
The basic structure of an area within the grand Worldline was created with the plains of existence as its base, the [Realities] enveloped these plains, becoming one singular structure that though separate, seemed nothing different from one another.
'Worlds' existed inside these realities and, these 'Worlds' were administered by the 'voices' of these specific words or in broader terms, the realities were managed by the 'Voices of the world'.
However, the realities are just a blanket covering the plain of existence or 'realms' so, even by the gods and higher beings who exist above these 'realities' see the 'realms' as places an entity or 'element' of the Worldline exists in.