In your OP you said the yata mirror took a long time against sasukes explosives did you not? Then you go on to say it was merely about 5-10 seconds which is hardly a Long time.
Databook, it can alter every one of its properties in order to deflect the attack. Therefore going by the databook it can change into multiple properties in order to block multiple attacks at once.
You can say, "NAH! IT'S INVINCIBLE! NOPE! I DON'T BELIEVE YOU!" but I think this is a legitimate way to break Itachi's "almighty" Yata Mirror that people cherish so much. It's actually very easy.
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We know that Yata Mirror can turn itself into any Attribute to block any attack right?
Now what if you have a TBB charged, shoot a Rasenshuriken at it, Yata blockes it, but immediately afterwards, you release the TBB?
The Yata Mirror would only react to the attributes to the Rasenshuriken, and not the TBB's attributes.
Therefore, the Yata Mirror would probably break as it can't protect itself from two different consecutive attacks.
I don't think it can swiftly change it's attributes when it's getting hit by Rasenshuriken... and Rasenshuriken makes a big explosion. Yata Mirror took a long time defending against Sasuke's regular Explosives.
So basically, here's what you need:
- Multiple Kinds of Ninjutsu of different Types/Natures
- Make sure it has shield-breaking capabilities. (Not something like a Water Wave)
Well, I think the shield might break if you do this.
What do you think?
I was exaggerating when I said LONG time. You took it too seriously.
5-10 seconds is a long time if you're blocking something.
It never said Multiple properties. Gg.