That's why Itachi unlocks it after seeing Shisui's suicide. Meanwhile, Sasuke awakens it shortly after killing his own brother, when he learns the truth about Itachi. However, for a long time ...

The most intriguing of Sasuke's evolutions was his Curse Mark, a significant power amp that was given to him by Orochimaru during the Chunin exams. Despite being a curse of sorts, the Curse Mark ...