Izanami is??????
First of all, let me say that i hate these recent godamn flashbacks of Sasuke, reason being is that they have no timeframe in them, it´s like a movie that doesn´t go along the plot, there was no timeframe for that flashback to exist in the story, not that and not the sasuke, itachi mission.
Now with that said, on to the theory.
Let me first go into what Itachi said:
"Izanami forms a pair with Izanagi."
Which means it does something to complete it, like ying and yang and here is an off topic thought that popped up to me just as i´m writing this:
You need both to use creation of all things.
Now back on topic, let´s first go into what Izanagi is before we determine what Izanami is, as Itachi said, if Izanagi changes destiny then Izanami decides it.
I will give you a clearer example of how Izanagi changes destiny so that i can tell you what Izanami is.
Here is a scenario.
You go into a fight with a sword, you´re a famous swordsman, your opponent kills you in 1 minute by cutting off your head, later your name goes into the history books and people might say that destiny were not on his side.
Now let´s go back to the same scenario where he fights the swordsman, this time he has izanagi activated, so the opponent cuts off his head(destined to happen) and Izanagi activates, turning that destiny into a mere dream, turning that reality into bullshit.
Now since Izanami is a technique that forms pair with Izanagi like Yin and Yang, i think Izanami is a technique that turn bullshit into reality in its own way.
Another mad power given to Itachi, making him OP and i can so predict the Itachi bios that will pop up this week and next.
