inventions at aizen's time

Inventions

• Hōgyoku (崩玉, Crumbling Orb, Viz: "Breakdown Sphere""): Aizen has stated that he arrived at the conclusion of the Hōgyoku before Kisuke Urahara, however, it ended in failure. In order to finalize the Hōgyoku, the souls of hundreds upon hundreds of Shinigami and hundreds and hundreds of Rukongai citizens who bore Shinigami potential needed to be sacrificed to it, but it still wasn't satisfied. According to the experimental data Kisuke Urahara's Hōgyoku was also incomplete. Therefore he decided to steal that Hōgyoku and present it to his own. Produced as a result to Aizen's Hollowfication research, this Hōgyoku is what gave the Visored their Hollow powers. This process used seems to spread as some form of possible infection through wounds, that has the desired effects on souls with high-level spiritual energy as compared to souls with low-level spiritual energy, causing those infected great sickness and fatigue, until they vomit up a white liquid that forms the beginnings of their Hollow mask, which then proceeds to transform their bodies and warp their minds. Other than that all that is known is that the process is accelerated by aggressive emotions.^] The conclusive result makes a Shinigami into a primarily Hollow-like humanoid, which is a highly unstable transformation causing mindlessness and aggression.

Caja Negación (反膜の匪 (カハ・ネガシオン), kaha negashion; Spanish for "Negation Box," Japanese for "Anti-Membrane of Negation"): This cube, when used on a subject, traps them in an alternate dimension from which there is no escape; however, this assumes it's being used as intended. More powerful Arrancar, namely the Espada themselves, can escape, given enough time.