Great Trees

Great Trees were trees planted by the Ascended in ancient times that honed their influence and allowed them to communicate with their followers in the material plane, and allowed the use of divine magic in the material plane. The trees could only be destroyed by Razors, special weapons crafted with only this purpose in mind. The lives of the Ascended were tied directly to their trees, meaning that if a tree were destroyed, the Ascended connected to it would die.

History
In ancient times, the Ascended, led by Immaru, were able to navigate the Astral Sea, and crossed it. There, they each planted a Great Tree, allowing them to communicate with the material plane, and gifting the use of divine magic to the plane as well.

The trees drowned out the Creator, causing the Ascended to be worshiped as gods.

After a time, the Ascended wished to have all the souls of their followers to themselves, and a great civil war broke out among them. During this war, Immaru, the most devious and deceitful of the Ascended, used the Razors to cut down the Great Trees until only two were left: his, and Tiamat's (his dragons were not able to cut down Tiamat's tree since she was their mother).

During the Age of Deception, these were the only two trees remaining. They lasted until the end of the Age of Deception, when the Four Knights armed with Sychrasel -- one of the Razors -- embarked on their crusade to destroy the trees.

After a mighty battle with Tiamat, they cut down her tree, killing her. Then, with Sychrasel, they destroyed Immaru the Deceiver's tree, ending the Age of Deception.