Tree of Harmony

The Tree of Harmony is a tree located in the Everfree Forest near Princess Celestia and Princess Luna 's old castle. The tree carries the Elements of Harmony and in the center lies Twilight's cutie mark. Near the roots of the tree arre Celestia's and Luna's cutie mark.

Princess Twilight Spark Part 1 & 2
T n season four's two-part premiere, it is revealed that Princess Celestia and Princess Luna found the Elements of Harmony embedded in a tree in the Everfree Forest called the Tree of Harmony. Each element is embedded in one of the tree's branches, with the element of magic in the tree's center.

The tree and the elements were discovered during the reign of Discord thousands of years ago, and were the only means they had of defeating him. According to Celestia, the tree controls and contains all that grows in the Everfree Forest and will continue to do so even without the Elements of Harmony in it.

During the two-parter, it's discovered that the Tree of Harmony has lost all of its magic, allowing Discord's "plunder seeds" to grow all over the Everfree Forest. By the end of Part 2, Twilight and her friends give up the Elements of Harmony and return them to the tree, recharging its magic and returning the forest to normal.