With their battle nearing the end, Sasuke unleashes his final attack, Kirin. Instead of using his chakra for energy, he utilizes the enormous energy of the atmosphere and then use it for a Lightning Element Technique. Sasuke commanded the lightning and guided it to Itachi.
Sasuke already exhausted believed it was over but Itachi stands. He used Susano’o, his last card to defend against Sasuke’s Kirin attack. In addition to Tsukoyomi and Amaterasu, another technique was born when Itachi gained his Mangekyu.