Despite being a curse of sorts, the Curse Mark became a great source of power for Sasuke, allowing him to rival Naruto's strength with the Nine-Tails. In Naruto Shippuden, however, the Curse Mark ...

When Itachi Uchiha first introduced the bewildering power of the Naruto Shippuden series, it was the ultimate weapon against Sasuke ... Susanoo used that very sword to kill Yamata no Orochi ...