Wayward Worldsoul

A Wayward Worldsoul is an entity that was once a Worldsoul of a plane but has somehow become detached from it, most commonly due to the destruction of the plane.

Description
Wayward Worldsouls maintain much of the inherent abilities of a Worldsoul, being quite powerful and only susceptible to magical damage outside of manifested avatars.

Wayward Worldsouls can occasionally relocate to a plane that is without a Worldsoul and recover their plane-spanning abilities, likely changing the nature of the plane as they do so. While it is possible for one to defeat an existing Worldsoul and take over their plane, it is very unlikely due to the great power difference between a Worldsoul that inhabits a plane and one that does not.

Domains
Instead, some of these Worldsouls have taken to trying to become the "Worldsoul" of other areas or concepts, called Domains. Wayward Domains can be fixed, occurring in a area that can grow but is unlikely to otherwise move, or wandering, occurring in a much smaller area that is capable of moving, usually being centered on the Worldsoul itself. Within these more limited Domains, these Worldsouls can use their omnipresence and increased power as they would have been able to on a plane.

Wayward Worldsouls will use their Domains in a variety of ways: Some will settle into a plane's existing pantheon and eventually become indistinguishable from it, some will use their Domain to attempt a foothold at ousting a Worldsoul to claim the plane for themselves, and some will simply wander as an unusual microplane in the Multiverse.

Decrees
As more of these Worldsouls appeared over time, massive fights would break out between Worldsouls attempting to lay claim on the same Domain, causing massive damage in the areas where these increasingly large battles took place. In an attempt to end the violence before it escalated to the scale of the Elder Dragon War, magical laws called Decrees were crafted to regulate interactions between Worldsouls and between mortals. Each of them became the Domain of a Worldsoul to ensure their enforcement.

The First Decree
The First Decree outlines the limits of Wayward Worldsouls interacting between each other, most importantly, decreeing they should not fight each other directly.

The Second Decree
The Second Decree outlines the limits of Domains, most importantly, seeking to rigidly define how they exist and are claimed to prevent Worldsouls from imposing on each other's Domains.

The Third Decree
The Third Decree outlines the limits of Wayward Worldsouls interacting with material entities, most importantly, allowing them to interact with them and grant their blessings, but disallowing them from attacking them except in retaliation or defense of their Domain.