The Aura Trio consists of Xerneas, Yveltal, and Zygarde in Pokémon Aura. Xerneas spent a thousand years sleeping in the form of a tree before reviving and sharing eternal life. Yveltal absorbs the life force of all living things and turns into a cocoon when its life comes to an end. Zygarde comes to attack whenever the natural order of Xerneas and Yveltal are disrupted. These three Pokémon, according to Professor Sycamore, are "incarnations of nature that take care of the land".