Bankai Training, Bleach Wiki

Bankai Training is an event taking place over the course of the last three days of the Ryoka Invasion's central conflict: unable to defeat 6th Division Captain Byakuya Kuchiki and rescue Rukia Kuchiki at his current level of power, Ichigo learns of the existence of a rare secondary release for Zanpakutō known as Bankai and begins training to achieve it before Rukia's execution by using a dangerous but efficient process. During this period, the other Ryoka around the Seireitei find themselves in

with the fall of the head captain, who's bankai do yall think now takes the place as most powerful among the gotei 13 : r/bleach

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