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[Denzel Washington]

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MS usage overall is what causes blindness, it wasnt susanoo. Susanno doesnt cause immediate pain to the eyes like amaterasu or tsukuyomi.

Ok.

@Bold

Nope, Susano'o useage causes strain on the eyes just like any other MS technique. Hence why when he went to V3 Susano'o when confronting Kakashi, he clutched his eyes in pain and started going blind.