Forest Shadow

In this world, there are four guardians: the guardian of the sky, the guardian of the underworld, the guardian of the sea, and the guardian of nature. Somewhere in the world sits a forest that holds the entire power of nature, and the guardian of nature themselves. Somewhere else is a spirit, the spirit of shadows and the lack of light. Fate draws the spirit to the forest, where they meet the guardian and take their power to become the new guardian of nature. There are only a couple of flaws with this: the spirit is partially possessed by an evil shadow form that was configured by another high-level spirit, who calls himself the Devil. This "Devil" is in pursuit of the overthrow of the guardian of nature, and the shadow spirit must confront the Devil and protect the power of nature for the sake of the forest and all who live there.