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Originally Posted by kael03 It causes an eye to go blind and Itachi didn't want to sacrifice an eye on who he thought was the strongest Uchiha ever to live? Or he didn't know about Izanami until later? He only found out about the guy when he was 13.

Agreed. He might have found out about him when he was 13 but he still had 8 years after that. While I do feel that Izanami was introduced only to counter Kabuto's negation of the Sharingan abilities, was there a counter to it? Sacrificing an eye to take Obito out of the picture was one that could have been afforded. Though the doubt of Obito having had some counter to it is what might have kept Itachi from trying...