Danzo was able to use it on mifune with out eye contact , all rapped up please go re-read the manga
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Itachi was given Shisui Mangekyou fully activated he used it once before if he didn't why did he have to wait another 10 yrs ? the only reason he burnt it is because he had no more use for it because he wasn't alive thats like bring up the sage of the six path saying well he isn't the strongest anymore because Madara has his juubi power no ones running with that lol
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