Detecting this, the HР•РЊgyoku fully awakens, causing his body to begin undergoing a transformation. Not long after, Aizen engages Isshin Kurosaki in combat, who pushes him to the limit of his Shinigami self. During the Gotei 13РІР‚в„ўs battle against his Arrancar army at the fake Karakura Town, he reveals this to Ichigo Kurosaki. Р”Р„t some point after showing the orb to Orihime, Aizen combines it with Urahara's HР•РЊgyoku and embeds the product into his own body.

Aizen's reasoning for capturing her is later proven to be a ruse, as he brought Orihime to Hueco Mundo in the hopes of luring away some of the Gotei 13 captains so he may invade Karakura Town with less resistance. As a sign of trust, he shows her the HР•РЊgyoku itself, which inspires her to seek to negate its existence with her powers, rather than heal it. He reveals to her that every time the HР•РЊgyoku is used, its power deteriorates somewhat, and that he brought her to Hueco Mundo to repair it. Later on, Aizen has his Arrancar capture Orihime Inoue because of her special ability, the Shun Shun Rikka. Using a device invented by Urahara himself, Aizen extracted the HР•РЊgyoku from Rukia's soul and retreated into Hueco Mundo, where he used it to bolster the power of his Arrancar army. However, this plan was foiled when the SР•РЊkyoku was destroyed by JР•В«shirР•РЊ Ukitake and Shunsui KyР•РЊraku, so Aizen resorted to the second method. Because the SР•РЊkyoku was only used for the execution of Shinigami who broke the law severely, Aizen, murdering the Central 46, impersonated them with the special ability of his ZanpakutР•РЊ, KyР•РЊka Suigetsu, thus orchestrating the events leading to RukiaРІР‚в„ўs execution. Aizen had delved further into Urahara's research, discovering two ways to extract an object from a soul: the first was to evaporate the soul with an immense amount of heat, which could be accomplished with an instrument such as the SР•РЊkyoku. His plan failed when SР•РЊsuke Aizen betrayed Soul Society to retrieve it - unbeknownst to Urahara, Aizen was the one who had deployed Rukia to the Human World in the first place. By giving her a special Gigai, which would eventually turn her soul into that of an ordinary Human permanently, he hoped it would hide the HР•РЊgyoku forever. Out of desperation, he deactivated it and placed it deep within the soul of a Shinigami, Rukia Kuchiki, without her knowledge. Sometime after his exile, Urahara sought a means to destroy the HР•РЊgyoku, but to no avail. Eventually, the group of Shinigami, gaining control over their new-found Hollow powers, became known as the Visored, rogues rumored to have gained Hollow powers through illegal means. Framed for the incident by Aizen, Kisuke fled to the world of the living with the group of Shinigami, bringing his HР•РЊgyoku along with him. However, while it succeeded in stabilizing their souls, it failed to undo the Hollowfication. In an attempt to reverse the damage Aizen had caused, Kisuke Urahara used the HР•РЊgyoku on them. With the help of his subordinates, he forcibly caused Shinji Hirako and a number of other Shinigami captains and lieutenants to undergo Hollowfication. Roughly 101 years before his defection from Soul Society, SР•РЊsuke Aizen put an experiment into motion which would put the true capabilities of the HР•РЊgyoku to the test. With this in mind, Aizen sought to steal UraharaРІР‚в„ўs HР•РЊgyoku and present it to his own. In time, by analyzing the research data concerning UraharaРІР‚в„ўs own HР•РЊgyoku, Aizen learned that it was also incomplete. Realizing that it was still incomplete, Aizen presented to it the souls of hundreds upon hundreds of Shinigami and Rukongai citizens to no avail.

Some time before Urahara even conceived the concept of the HР•РЊgyoku, SР•РЊsuke Aizen, having already come to the same conclusion, had created one of his own.

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