Mark of Bankaiship

The Mark of Bankaiship (Japanese VIz Translation; Maku no Bankaishippu) is a term for a sceret test of Soul Reaper power shinobi from the Ninja World of Konohagakure, Kirigakure, Kumogakure, Iwagakure, and Sunagakure to achieve their second release of their Zanpakuto also known as Bankai.