Spoiler-Safe Summary

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Naruto taps into increasingly powerful forms during his intense fight with Pain, pushing his limits as the village faces a devastating new threat involving ancient, destructive techniques.

Full Plot Summary

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Naruto enters his Four-Tailed form and attacks Pain, who manages to repel his attacks. Angered even further when Pain mentions Sasuke, Naruto continues his transformation into a Six-Tailed form. Pain decides to fall back from the village toward where Nagato is to trap Naruto with Planetary Devastation, a powerful jutsu that the Sage of Six Paths used to create the moon, to trap the Jinchuriki within a miniature moon in midair. But Naruto starts breaks free to Pain's shock, now in a monstrous eight-tailed state. Within his mind, Naruto succumbs to the Nine Tails telling him to embrace his hate and destroy everything. Naruto was about to remove the seal to completely release the Nine-Tails when he is stopped by the Fourth Hokage Minato Namikaze.