Bleach 230

S13, E1: A mysterious man who calls himself "Muramasa" appears in the Seireitei to declare war against the Soul Reapers. Using his powers, Muramasa gives physical form to the Zanpakuto and liberates them from the captains and lieutenants of the 13 Court Guard Squads. Without the use of their weapons, the Soul Reapers now find themselves in a tough battle against the Zanpakuto who have turned against their former masters.