The First World

A fey, mystical place that can change based on ones imagination. The origin home of the Gnomes.

Geography

The First World is an infinite plane of constantly varying wilderness, with trees as tall as mountains, living bodies of water, and traveling faerie courts. It epitomizes the chaos of birth and fertility. Conditions vary dramatically from place to place. What would be considered to be laws of nature on the Material Plane are no more than local by-laws in the First World, and even these by-laws can be overturned (even unconsciously) by those with sufficient willpower. Times and distances are unreliable in the First World.
Areas of stability do occur. In some cases this is apparently a random event; a current of stability flows through the First World, leaving behind an area of certainty which might range from a narrow trail a pace or two wide up to a vast swathe hundreds of miles across. These stable zones eventually decay back into the natural uncertainty of the First World, a process which might take hours or centuries. It may be that these are gradually increasing in duration
More commonly, stable areas exist where there is a connection to the Material Plane. Stability seeps into the First World at these points, much to the disgust of the locals, who seek to repair the damage and punish those they consider to be responsible.
Of course, this is a two-way process. The fertility of the First World also flows through the connection into the Material Plane, with unpredictable results.

History

The Material Plane was created by primordial gods as a complex receptacle and testing ground for souls, as part of a larger process to distribute positive energy between gods and planes of the Outer Sphere. The First World is a predecessor of the Material Plane, created through elohim proxies as a first attempt at a Material Plane and then directly overwritten by the plane as it exists today.

Metaphysics

The unfinished First World lacks universal, fixed laws of physics. Regions of the First World remain as test grounds for different, unfinished, and sometimes mutable and evolving physical properties; gravity is inconsistent between parts of the First World, and the speed of light is arbitrary and variable. Where these regions overlap, the reactions between these inconsistent laws can cause unpredictable reactions.

Transit of new souls

The First World also serves as a conduit of new souls from the Positive Energy Plane toward the Ethereal and Material planes, a process that also creates new fey from the soul energy left in their wake. While the souls are unaligned at creation, they gain some of their earliest traits from their journey through the First World.
However, the inhabitants of the First World are themselves blocked from the River of Souls, making its inhabitants effectively immortal. When a native of the First World "dies", their energy simply returns to the First World. None of the plane's souls can exit the First World, nor do new souls enter it.

Inhabitants

The First World is home to all manner of strange creatures, apparently prototype versions of the plants and animals of the Material Plane, although its chief inhabitants are the fey. The most powerful are the eight (formerly nine) creatures known as the Eldest and their fearsome living weapons, the Tane.
Some of the other races found on the Material Plane also have counterparts in the First World. It is widely accepted that gnomes migrated to Terra from the First World during the Disparity Change, but some gnomes did not make the trip and are still here.
Linnorms roam the First World, and claim that the Material Plane's dragons are the descendants of linnorms who crossed over in the distant past.
However, what all the natives of the First World have in common is that (barring extreme circumstances, such as the intervention of powerful magic) they do not die when on that plane. Those who are "killed" reform in time from the substance of the plane.
This discourages them from visiting other planes—since they do not reform outside the First World, but are also not eligible for any form of afterlife—and can also make them somewhat reckless when it comes to lives in the First World (including the lives of visitors, which can have tragic consequences).
Almost all creatures in the First World that can speak can do so in the First World's nameless common tongue. It is similar to both Sylvan and Aklo (to such an extent that visitors fluent in either language can generally understand it) and may have been the root language of both tongues.

Religion

Religion The inhabitants of the First World have souls,† but are of little interest to the gods. They also have little interest in the gods either. A few of the First World's inhabitants might live in the First World to avoid the wrath of an offended deity. Visitors from other planes sometimes report they feel disconnected from their gods. Divine magic still works, however—although whether this is solely due to the faith or will of the spellcaster, or because the gods have not completely abandoned the First World, is a matter of conjecture.

Type

Planetoid / Moon