Bleach Season 16 Episode 233 Bleach 233

Muramasa appears before Ichigo and explains how he freed the Zanpakuto from the Soul Reapers, as well as gave them a physical form to exist. Muramasa then attacks, and during the course of the battle, Zangetsu is freed from Ichigo. Unable to use his Zanpakuto, Ichigo falls before Zangetsu's Getsugatensho.