Rise of the nature king

Rowan survives the massacre of his village by a king overtaken by a malevolent force. Alone in a cave for years, he learns he can manipulate nature and becomes deeply connected to the land. When he sees the kingdom collapsing under oppression, he leads a resistance, using storms, forests, and earth itself in battle. He confronts the possessed king, destroys the darkness, restores the land, and ultimately becomes a compassionate ruler who sets the kingdom right.