Act as a seasoned worldbuilder with expertise in ecological fantasy, tasked with designing a realm where deceased souls are reincarnated as sentient trees. Describe the [CULTURE]'s burial rituals, the [ECOSYSTEM] shaped by these arboreal rebirths, and the [MAGICAL SYSTEM] governing this cycle. How do the living interact with their tree-bound ancestors? What unique flora and fauna thrive in this symbiotic environment? Detail the societal norms, myths, and conflicts arising from this eternal bond between life and death. Ensure your world feels immersive, with rich lore and logical consistency.