You never knew what Uchiha Itachi might pull out next.
At first, everyone thought his Mangekyō Sharingan had only Amaterasu and Tsukuyomi. Then, out of nowhere, he brought out Susanoo. And to deal with Orochimaru, he pulled out the Totsuka Blade and the Yata Mirror.
Later, after his Impure World Reincarnation, just when everyone expected him to be controlled by Kabuto like the rest, Uchiha Itachi took a different path. Others might be controlled, but not him. Enter Kotoamatsukami!
Through Kotoamatsukami, Uchiha Itachi broke free of the Impure World Reincarnation's control and returned to protecting Konoha. And because of his reincarnated body, he no longer had to worry about his illness. He could even use his Mangekyō Sharingan as much as he pleased, as though he had gained the Eternal Mangekyō Sharingan by another means.
That made Uchiha Itachi immensely powerful. He helped Naruto and Killer B seal Nagato, then faced Kabuto, who had learned Sage Mode, and displayed both his brilliant tactical mind and a special ability: Izanami.
After all, no one had seemed to expect Izanami to exist.
When it came to underhanded tactics, Uchiha Itachi was in a league of his own. If Uchiha Yi had to choose the most devious Uchiha, his vote would go straight to Itachi.
To put it more darkly, Uchiha Itachi hardly seemed like an Uchiha at all. What normal Uchiha spent his time thinking about wiping out his own clan?
Perhaps Uchiha Itachi was Tobirama Senju's curse upon the Uchiha Clan. Their approaches to combat were remarkably similar too. Ahem...
Still, there was no denying Uchiha Itachi's tactical brilliance. As Sasuke Uchiha's personal cheat, he had given Sasuke the biggest premium upgrade of his life. By the later stages, Itachi might as well have been Kishimoto stepping in personally.
But to