Itachi knew about IT

[Kiro man]

As an user of Tsukuyomi,he probably knew about the ultimate genjutsu,Infinite Tsukuyomi.

Here he says it:

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The moon's eye has sharingan and rinnegan combined.

He says with his mangekyo combined with Nagato's rinnegan he can do anything,then at the other image he says:"The user will use my illusion power at the perfect moment", and also we can see the moon when he says that.

So basically,the illusion Itachi speaks about is Infinite Tsukuyomi.What a smartass ninja...

 

[Dãrth1]

Lord Itachi solos

 

[-immortal-]

Good for itachi? he dead

 

[Pirate King]

itachi could use IT

 

[Slowpoke]

IT

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[Joon]

That was doing the time when Obito, in the guise of Tobi, initiated his plan to fight the alliance during night. He used Zetsu's ability of copying the Chakra of its victims to cause disarray.

 

[USSJ Future Trunks]

no he didnt. or else he wouldnt have aimed to stop ET and not what he knows to be the certain end of the world.

 

[ᖇ α z m α η]

His a skilled Uchiha clan member, not much of a surprise he knows about IT :/​

 

[Awkward Linguist]

He is a God.