World-tree

A world-tree is a magical capsule created by the Pantheon during the Ordering of Creation.

About
Numerous worlds were discovered by the gods during their cosmic journeys, particularly Aimar, who was revealing new planets by the day. As they were so many in number, Meinolf and Elva designed a method of holding all the worlds together in a single realm, known as a world-tree. Each world tree would hold a different amount of planets, and by coalescing the natural magics of each worlds into its root, the tree would stabilise the Creation and keep it together. Different world-trees with various names were created, including Yggdrasil, the world-tree that houses Middle-Earth, the homeworld on which the Aeon of the Champion story series takes place.

The High Heavens and Burning Hells are not housed in world-trees because they are too encompassing, and also because they do not exist on a material plane; instead, they exist on a higher layer of Creation known as a spiritual plane.

Since world-trees are eternal, there are two ways to bring them to an end - corruption, or destruction.

Destruction of world-trees
If a world-tree is destroyed, then the sheer force of the destructive impact is likely to cause the harmonised magics of the tree to burst into activity, causing them to explode and likely destroying the homeworlds inside, either by de-materialisation or collision. This act also tears holes in the fabric of Creation, making it possible for energies held in one dimension to seep into the other, resulting in inter-dimensional taint - a phenomenon the Pantheon worked very hard to avoid. The Void gods often use this tactic to release chaos onto the Universe. Once a world-tree has been destroyed, it cannot be reborn; it leaves a permanent scar on the fabric of the Cosmos itself.

World-trees can also be corrupted to make them grow into insidious, twisted forms known as dark trees, which can give birth to voidworlds. This is considered a serious problem, one that the High Heavens continuously refused to acknowledge as their focus was on the Eternal Conflict.