Spoiler-Safe Summary

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Mayuri confronts Szayel Aporro in his laboratory, while Kenpachi struggles against Nnoitra's nearly impervious skin, leading to intense combat and tactical challenges among the fighters.

Full Plot Summary

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Szayel Aporro, whose senses are heightened by the drug, feels Mayuri's zanpakutou piercing through his hand and heart for what he feels as centuries before he dies. After restoring Nemu to full health, Mayuri orders her to clear away the rubble that concealed Szayel Aporro's laboratory. Afterwards, Mayuri heals Uryuu's injuries. Meanwhile, Kenpachi has difficulty cutting through Nnoitra's skin, which Nnoitra claims is the toughest of any of the Espada, but believes that Nnoitra can be injured. Kenpachi stabs Nnoitra through his eyepatch, but Nnoitra counterattacks, injuring Kenpachi. He then reveals that Kenpachi had stabbed him through his hollow hole, which is where his left eye should have been.