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.
In Hueco Mundo, Ichigo battles the Sternritter Quilge Opie. This fight showcased the anime's upgraded lighting and animation effects, specifically how Quincy "Reishi" looks compared to Soul Reaper energy. 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. Captain Shinji Hirako uses his Bankai, Sakashima Yokoshima
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. This fight showcased the anime's upgraded lighting and
The most recent Episode 3 deals with the fallout of the Soul King's "death" at the hands of Ichigo (who was being controlled by Yhwach). BLEACH: Sennen Kessen-hen - Episode 3 discussion : r/anime
This episode focused on the desperate counterattack by the Soul Reapers after their Bankai were stolen.