Black Chidori

Black Chidori is an enhanced version of Chidori that Sasuke Uchiha uses by drawing chakra from his Cursed Seal of Heaven. The activation of the seal makes the technique noticeably more powerful than a regular Chidori, changes its color to a darker one, and transforms the characteristic piercing sound into the flapping of wings. When using the first stage of the seal, the Chidori in most cases acquires a purple hue. Sasuke used this variation during the decisive battle with Naruto Uzumaki in the Valley of the End.