The Eterna-verse is the name of the collection of all planes of existence within the Hollow writing, physical or otherwise.

These stories follow how Anodyne, and all the other deities live out their lives. How they interact with one another, and all the strangeness that the Eterna-verse has to offer.

The Eterna-verse is beyond comprehension

The Eterna-verse is the classification that is used to describe how this story world operates on a cosmic scale.
It is so much larger than a typical multi-verse, with infinitely more oddities, and complex connections.