Board Thread:Theories and Speculation/@comment-26005711-20150719134117/@comment-734582-20150719161349

Minato 87 wrote: Ok, but why he didn't revive Itachi (he loves his brother, and he wanted to revenge for him) and Sasuke "killed" Itachi (Itachi die in battle with Sasuke). Because Nagato's belief that he could survive the technique was probably a lie by Obito so he would perform the technique on Madara willingly. Madara makes it very clear that once the technique is used, the user dies. Black Zetsu managed to keep Obito alive a bit longer, but he was dying, even though it did go pretty slow. The user pays for other people's lives with his own life.