"Not a weapon, but a being at my disposal that will change how the inferior see the world. Finally, their eyes will be opened, with the power of the Unnatural Advance...!" - Yuuma Fujita Unnatural Advace (不自然しんげき, "Fushizen Shingeki in Japanese lit. Advancing unnaturally"), is a powerful blue stone created by Yuuma Fujita. It's ability to control the boundary line between Hollow and Shinigami and allow either one to possess power of the other. Only one exists, and it is in the possession of Yuuma.