Chapter 550 reveals the origin of the crow hidden inside Naruto and the Sharingan it carries, as Itachi turns Amaterasu on Nagato's summons. The reanimated pair press their assault, ending with Nagato draining Killer B and reaching for the Human Path against Naruto.
The crow that Itachi once left within Naruto bursts free from his mouth. When Itachi tries to unleash Amaterasu on Naruto, the bird meets his gaze and forces him to halt. Redirecting the black flames, Itachi burns Nagato's canine summon before rounding on Nagato himself and his winged beast. He then tells Naruto the story behind the crow's Mangekyō Sharingan, explaining that Shisui Uchiha entrusted him with the eye and charged him to use it in the Leaf's defence. Kabuto, eavesdropping, gloats that his fortune only keeps improving.
Nagato tears himself loose from the flames with Shinra Tensei, and Kabuto appears to strip away his lingering will. Slipping behind Naruto atop a chameleon summon, Nagato lashes out again with Shinra Tensei at both Naruto and Killer B. He tries to strike B directly, but the jinchūriki shifts into his Version 2 form and answers with a Tailed Beast Lariat. Nagato then invokes the Preta Path to siphon B's chakra, the theft restoring a more youthful look to his body. With that renewed power, he seizes Naruto and moves to apply the Human Path technique.
Itachi's crow stops him from targeting Naruto, and he burns Nagato's summons with Amaterasu instead. Itachi recounts how Shisui Uchiha gave him the Mangekyō Sharingan to guard Konoha. Nagato breaks free with Shinra Tensei, absorbs Killer B's chakra through the Preta Path to regain his youth, then grabs Naruto to use the Human Path.
This chapter belongs to the Fourth Shinobi World War: Confrontation arc and was collected in Volume 58. It ran in the combined 35th and 36th issues of Weekly Shōnen Jump for 2011, dated August 22. Its title, Kotoamatsukami, refers to the genjutsu tied to Shisui's eye.

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The chapter's title, Kotoamatsukami, refers to the genjutsu tied to Shisui Uchiha's Mangekyo Sharingan eye, which Itachi carries through the crow sealed inside Naruto and uses to defend the Hidden Leaf.
Chapter 550 shows Itachi's crow bursting from Naruto's mouth to stop him from targeting Naruto with Amaterasu, so Itachi burns Nagato's summons instead, while Nagato later drains Killer B's chakra and grabs Naruto to use the Human Path.
Itachi reveals that Shisui Uchiha entrusted him with his Mangekyo Sharingan eye, sealed within the crow, and charged him to use it in the Leaf's defense.
Nagato uses the Preta Path to drain Killer B's chakra after breaking free of Itachi's Amaterasu flames with Shinra Tensei, and the stolen chakra restores a more youthful look to his body.
"Kotoamatsukami" is chapter 550 of the manga, collected in Volume 58, and it falls within the Fourth Shinobi World War: Confrontation arc.
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