Yata Mirror

The second of Itachi Uchiha's weapons which he added to his Susanoo, the Yata Mirror provides one of the highest defenses ever seen in the manga, increasing the Susanoo's already formidable defenses to a higher level. The Yata Mirror changes its chakra nature to block nearly all attacks, and as Zetsu claimed, it made Itachi nearly invincible. Only Kirin has shown the firepower required to overpower the Yata Mirror's defense.