Board Thread:Theories and Speculation/@comment-26005711-20150719134117/@comment-734582-20150902154301

RikudoSasuke wrote: i would think that madara knew izanagi at the time of izunas death.then head of a clan usually knows all its jutsu That's not what i meant. Madara made Obito revive him. If reviving the long-dead was easy, Madara would've made him pull back Izuna and the rest of his family too, since their loss was the entire point of Madara's plan.

Nagato only pulled back those who were recently killed. He didn't revive all the dead in Konoha, nor did he revive the Pervy Sage.