The Ones Who Know Everything (全てを知る者たち, Subete o Shiru Monotachi) is chapter 618 of the Naruto manga.
Orochimaru brings Sasuke, Suigetsu and Jūgo to the ruined Uzumaki Clan's Mask Storage Temple. Inside, Orochimaru searches for a particular mask, disturbing Suigetsu who found it strange that he knew exactly which one to choose. As they head back towards the village, Sasuke breaks away from the group to survey the village from a high point, which Orochimaru comments as something he needs to do as Konoha is still his birthplace. Arriving at the Uchiha clan's destroyed compound, Sasuke unseals the passageway leading towards the secret room of the Naka Shrine, lamenting its current condition. There, Orochimaru dons the mask which invokes the Shinigami, and explaining as he went along, slashes the Shinigami's stomach releasing the contents. These turn out to be the spirits of those the Shinigami had consumed, which returns Orochimaru's hands to him, but has the negative effect of reflecting the wound on him as well. On Orochimaru's instructions, Jūgo uses natural energy to activate the sporesObito had Zetsu leave on Sasuke to monitor him: six in total. Sacrificing four of them while Jūgo and Suigetsu held down the other two, Orochimaru uses the Summoning: Impure World Reincarnation and then transfers his being into one of the restrained Zetsu while Jūgo absorbed the other. The screaming White Zetsu spore clones are silenced once shrouded in dirt and ash, turned into the vessels of the men who collectively possessed knowledge of Konoha's history: the deceased First, Second, Third and Fourth Hokage.
The manner in which Sasuke observes the Hidden Leaf Village is very similar to which Naruto observed it in chapter 245. Even their words are very similair to each others.