Orochimaru?s curse seal is really a good back up power of those shinobi who are injected with it. However, using this power can be harmful to the user himself.

However, in the case of Sasuke, it seems that Sasuke has already learned how to control the power of Juugo (curse seal) without harming himself.

And with his current abilities and capacities, Juugo realized that among his clones, Sasuke is the most powerful, even powerful than the deceased leader of the Sound 5, Kimimaru.

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