The Alder Oak

The Alder Oak is a magical entity believed by the Kells to be the source of their gods' powers. Residing in the Aether, the tree was the first being made by Dumara in her attempt to create the universe, and is therefore believed to be the oldest living being in the universe.

While not technically a god in the sense that it can directly impact the world, the Alder Oak is often treated as one due to the Callow Gods' reliance on it.