Known as Tir Hynafol to the Gnomes, the Ancestral Plane is not unlike the world of Ylembica in that it contains many of the same environments we see on the material world. Seas, Deserts, Forests, and the like all exist on the Ancestral Plane, but contain a magical essence to them. Not only that, but they do not follow the same patterns that we might see on Ylembic. While environments follow strict rules based on elevation, weather patterns, climates, winds, and more, the same environments do not follow the same guidelines on the Ancestral plane. Similarly, all sorts of natural phenomena happen on the Ancestral Plane, from tornadoes, hurricanes, and thunderstorms to maelstroms, earthquakes, and, blizzards.
Long ago, when the Elder Aboleths invaded and dominated mankind, the Celestials eventually drove them back with help from the Couatl, as well as the power they found in the Planes. However, the Elder Aboleths cursed them to forget that, at one time, they existed in harmony as one race. The races were shaped by the plane they drew power from. A large number of the races drew their power from areas of great power within the Pleroma, and so call this realm home.
The Ancestral Plane is also known as the plane of nature, and many of the races seem to gravitate towards environments that reflect their place of origin and the traits that encompass them.
Each sphere within the pleroma is linked to a gift -
Sheol to Consitution
Aaru to Wisdom
Esium to Strength
Feywild to Dexterity
Jottenheim to Intelligence
Omeyocan to Charisma