Geological / environmental event
Over this year, Creator Dragons gradually invent many different species of trees. Each one is either chosen or customized for the area the Creator Dragon cares for, either providing nutrients, shelter, or shade. A large area of Creator Dragons adopt trees into their areas, sometimes sparking conflicts between two Creator Dragons. Some trees have thick and wide canopies, blocking light and providing shade for the creatures and plants that live beneath them. Some have low hanging branches to grant protection to creatures that dig fend near the bases. Some trees have very large trunks and branches, providing lots of homes for airborne creatures. Some trees are designed simply to keep soil in place. Most are flammable, some explicitly to catch fire, either to keep populations in check, or to keep the soil fertile.