Bankai of Ichibei, Captain of Zero Division. His Zanpakutō can absorb powers and let him use them.
First Division Captain, Yamamoto's Bankai could burn anything with its flames which buns at 15 million degrees temperature.
Kyoraku Shunsui is the current Captain Commander of Gotei 13. His Bankai is very powerful and fearsome. His Bankai abilities work in 4 different acts.
Adult Tōshirō's Bankai could freeze anything with his hand gesture only. This ice is different as anyone it catches loses spiritual energy and abilities.
Captain Unohona's Bankai releases a red color liquid acid that could turn any opponent into a skeleton in a few seconds.
Zaraki's Bankai makes him a mindless beast. It gives him immense strength and power using which he could cut through anything.
Byakuya's Bankai scatters thousands of blades into smaller blades that can be used as offensive and defensive.
Rukia's Bankai creates a cold mist and spread into a wide area. If anyone touches it, freezes and gets crumpled in a few seconds.
Bankai of Kisuke ( former 12th division captain ) takes the shape of a giant woman. It allows Kisuke to restructure anything it makes contact with.
When Komamura's Bankai lost its armor it become more dangerous and powerful. Ultimately increasing his speed, strength, and mobility. It also gives him regeneration ability.