Elder Silram of the Forest Elven tribe sat in his office at the top of the World Tree with a satisfied smile on his lips. The World Tree held their home planet, Ygdra, together and supplied it with the energy and nutrients the flora and fauna all over the planet required. It was rare to find a World Tree this big as an awakened planetary core, and World Trees didn't fare well with each other.
World Trees tapped into the living all over the planet, which included the planet after it awakened. However, the planetary cores repelled the World Trees, resulting in a massive battle that may as well tear the planet apart. Fortunately, that didn't happen with Ygdra.
The Forest Elven tribe found Ygdra and the World Tree after the World Tree had already spread its dominion all over the planet, filling every nook and cranny with an abundance of life.