Back at the Shrine of the Infernal God, the mage tells the group that he has learned that they have a magic item that can control the creator of the universe. The item is called a "master key" and has three levels of use: the simple master key, the more advanced master keys, and the one that is "without information enhanced interrogation" . The mage says that if they can get this magic item, they can bring everyone back from the dead. He wants to know what's going on in the ruined city of Ostia, and he asks the Asuna to come with him to the magic sphere.