Just as the heroes believe they have secured a victory by stopping the process at 75%, Shigaraki undergoes a near-death experience.
: The animation captures a chilling transformation, shifting Shigaraki from a mere villain leader to a force of nature. 🌊 The "Decay" Wave BokuNoHeroAcademia6_Ep_04_SUB_ITA.mp4
The climax of the episode is the literal disintegration of the city. Just as the heroes believe they have secured