Impure World Reincarnation Technique: Release (穢土転生の術・解, Edo Tensei no Jutsu: Kai) is chapter 589 of the Naruto manga.
The five Kage look on in shock as Madara unleashes his Susanoo. After stabilising the construct, Tsunade questions whether her grandfather really fought against someone who was so much stronger than five Kage put together. Madara responds by saying that Hashirama was the only one who could defeat him and then states that it was a good thing that he wasn't here as the extent of damage to the surrounding landscape would be on a much smaller scale as he sends the Kage flying with one swing from his sword — destroying the mountain range behind him in the process. Realising his full power, Ōnoki questions whether or not Madara had gone easy on him and Mū in the past, to which Madara states that why an adult should fight seriously against children. As the Kage stand to face Madara nonetheless, Ōnoki then states that they would not back down now, causing Madara to resolve himself to crushing their beliefs. Elsewhere, Itachi then commands Kabuto to use the hand seals he had just stated to end the Impure World Reincarnation. Sasuke uses this time to state his resolve to Itachi and that he will destroy the village because of what it did to him before bidding farewell to Itachi. As the technique is released, the reincarnated shinobi from all-over the battlefield begin to deconstruct. Upon seeing this, a battered Naruto and B thanks Itachi and uses it as motivation to wrap things up with Tobi as well. Before being completely decommissioned, Itachi heads towards his little brother with his hand outstretched, stating that he could still make it.