Lol, I think we both got confused. I didn't miss that, what I mean is the sword had to have existed before Itachi got the technique, spirit sword or not. I thought you were saying that the sword was essentially Itachi's own creation which is why I said how would Oro have heard of it if they didn't even know Itachi had that technique. What I meant is that Oro couldn't find the sword because wherever it was Itachi had gotten to it first, which is why Oro couldn't find it.

Anyway again we strayed from what I actually want to discuss which is how could Itachi suddenly have gotten it after killing his best friend because from the way he talks about it here its like bam I kill my best friend and I become a god, thats some Berserk stuff right there. Kishi doesn't make it seem like he had to do anything at all to master the techniques or get Susano'o, his best friend dies and Itachi gets all powerful jutsus, now thats some Inuyasha crap.

Anyway I'm done manufacturing discussion for today.