Originally Posted by The Special One
I think Itachi's crow bunshins and one finger genjutsu were just an extension of his skill, aside from inherited techniques. Like those techniques are to Itachi as FTG and Rasengan were to Minato.
But thats my question, wouldn't all of his genjutsu abilities be attached to his sharingan. An example would be possibly if Shisui had a brother, and his brother took over his eyes, would said brother possibly gain Shisui's abilities that so many in the shinobi world went out of there way to add to they're own repitore of moves. Maybe none of that is possible between the two, but why, whats the significance in the appearance of both being within one users eyes, but, without the abilities?