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The world of Naruto is the world of ninjas, and Bushido has declined. However, there is such a knife that has witnessed the ups and downs of the world and the bloody war. This is a story about a knife through generations, about a knife legend.

I, Yang Ye, know nothing and can't do anything. But I somehow saved the world. As for how, it was because the other person was too stupid. Villain:? ? ?