Ikkaku Falls! The Shinigami's Crisis Bleach : Season 12 Episode 8

Shuhei, Izuru, Yumichika, and Ikkaku fight to guard the four pillars used to switch the real Karakura Town with a fake one. Despite their efforts, one of the pillars is destroyed by the Fracción Poww, and the real Karakura Town begins to slowly return to the World of the Living.