Origin: Spirits of the Past [S.A.V.E.]

This anime fantasy opus commences with a backstory prologue set in an ancient era, when the moon awakened the forest and unleashed a terrible, destructive beast upon the Earth. As the story proper opens, the landscape of the world has changed immeasurably. Mankind is divided into two warring factions: one that seeks a peaceful, harmonious balance with the forest, and another that wishes to dominate and control it.