Kisuke Urahara sends "Hollowfied" pills to the Captains. Since Hollow power is "poison" to Quincies, it allows the Captains to forcibly take back their stolen Bankai.
Depending on which part you are watching, here is a detailed breakdown of the features and highlights from each Episode 3. 1. Part 1: "March of the Star Cross" (Episode 3 overall) Bleach: Sennen Kessen-hen Episode 3
One of the most shocking moments was the sudden, brutal death of Lieutenant Izuru Kira, who was blasted through the chest before he could even draw his sword. Kisuke Urahara sends "Hollowfied" pills to the Captains
Captain Shinji Hirako uses his Bankai, Sakashima Yokoshima Happōfusagari , which was never shown in the original manga. It reverses the concept of "friend or foe," making the Quincy army slaughter each other. It reverses the concept of "friend or foe,"
This episode shifted the focus from the human world to the absolute decimation of the Soul Society.