World of Nio

The Old World (旧世界), also referred to as the World of Nio (Original) (仁王の世界(元)), was an A.R. World and the native home of such figures as Saga no Mamoru and the Demon King of the Sixth Heaven. It is described alternatively as a land of plenty, where advances in technology and spirituality allowed for humanity to reach the stars and beyond, and a place where the gods provoked a massive, destructive war that left it all but ruined. Following the Chakravartin, it has been destroyed and replaced with another world to take its place in the multiverse. All that remains of it is raw, residual energy, known as karma.

What glimpses of it appear are inspired visually by the world of Asura's Wrath, which served as a major source of inspiration for Kamen Rider Nio.