To be fair, RSM Naruto was pierced by Sasuke's Kusanagi which seemed strangely OP during the War ArcHis RSM durability was nerfed, to where we see him tanking other attacks in lower forms but he failed to tank a simple sword during the Gaiden?
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I mean shit, the boy has been tanking a whole bunch of shit in his KCM, ranging from Lightning enhanced punches, to evenYou must be registered for see links.