Doomsday

Doomsday (滅日) is an event in which the world is destroyed and recreated anew.

The Doomsday is a ceremony which effectively heralds the end of the world, and begins the construction of a new one. The ceremony begins with the living turning into seithr, and their souls being returned to the Azure; following this, the world is reset, and, finally, the Successor of the Azure begins to reconstruct the world. The Qualified, however, still remain in the world as they have been chosen by the Azure. They are able to use Ars Magus despite lack of seithr.

White of Nothingness (虚無の白) is the final phase of the Doomsday. It is an altered scenery, completely white space of nothing.

Originally, Doomsday was a phenomenon the Takamagahara System was trying to cause, but with the system seized by Izanami, she and Yūki Terumi caused it.