
Bhunivelze reveals his plan to destroy the released souls of the dead, and he prepares to fight Lightning as a final trial before her tenure as the new goddess of death begins. Lightning travels to Cosmogenesis to release Hope Estheim as well as the souls of humanity from Bhunivelze's control. Representation of the Cosmogenesis is similar to the other "realms of formation" seen in the Final Fantasy series, such as the Void, or the Crystal World in Final Fantasy IX. The flood of souls, both of the dead and the saved, continually migrates toward the new world. When the final platform is reached, turning around will cause them to break and be absorbed by the new world, preventing Lightning from going back. There are rotating sun images with metallic spoke-like extensions representing rays of light. An image of Bhunivelze is positioned at the top. There are two larger platforms with four images: Etro is the lowest of the portraits depicted on these platforms, and a moon and a sun, respectively representing Pulse and Lindzei, appear in the platforms' center. The numerous platforms depict stylized solar and lunar iconography, as well as the goddess Etro in angelic form. The focal point of the space is an intricate golden crest with an ominous black silhouette: the shape of Bhunivelze.

There are few stars to be seen, but small orbs with spikes float in the distance. It is an ethereal plane with the new world in the distance. The location resembles outer space, and Lightning describes it as "a realm known only to the gods". The area is linear, featuring only a series of circular platforms connected by a glowing stream of green energy. It is the realm where Bhunivelze resides and watches over the new world's creation.

Cosmogenesis is the final location in Lightning Returns: Final Fantasy XIII.
