Heartwood Forest

A Heartwood Forest is a natural phenomena that appears throughout Devidica. A forest's core thrives and its compost is not cleared away quick enough by its inhabitants, resulting in a highly fertile mound the slowly builds up. Trees that grow on these mounds are healthier and grow faster, resulting in a faster rate of compost and vegetation. Eventually, the area becomes so fertile that Earth Spirits and Fairies are born and it becomes a Node of Earth, or in rare cases Life. After becoming a Node, the trees begin to grow at an alarming rate and to impossible heights, fusing together as their trunks grow into their neighbors. The Final result is usually a super-massive tree that threatens the clouds.
The Green Spire is the most well known of Heartwood Forests, as it is a collection of three super-massive trees that had started to grow into each other. The Node between the three trees is saturated with magical energy and Earth Spirits are born daily and fostered by their Fairy parents to prevent them from escaping into the surrounding city that shares the Node's name.
Since the population of the Green Spire, artificial Heartwood Forests have been created with the tutelage and help of the Earth Fairies and the Lian settlers. These Heartwood Forests are unstable, however, and require magical maintenance preformed by an elite caste of Flow Seekers. Without the "repairs" and "additions" the Flow Seekers preform, the artificial forests would die The Green Spire and rot to their previous states.