Naruto: Madara, Transmigrated into Uchiha Itachi

[Transmigration + No System + No Romance + Canon Characters + Steady Progression + No Out-of-Character Portrayals]

"Just as you treated Obito as a pawn, you yourself were only a pawn all along."

At the climax of the Great Ninja War, Black Zetsu's hand pierced Madara Uchiha's heart. Helpless, Madara felt his control over his own body slipping away. He could not help voicing the question haunting him.

Hashirama, where did I go wrong?

His dying question would receive no answer. Kaguya took over Madara Uchiha's body, leaving him a mere spirit who could only watch as Sasuke Uchiha and Naruto Uzumaki saved the world from her. Only then did Madara finally understand: he, who had always considered himself a savior, was nothing more than a fool manipulated by Black Zetsu.

When the dust settled, Madara Uchiha fell into a deep slumber. When he opened his eyes again, he still bore the Uchiha name-but this time, the name others called him was Uchiha Itachi.