Naruto: Overthrowing Uchiha Tyranny

Also known as Naruto World: A World Where the Protagonist Was Killed

This is a Naruto world where Black Zetsu transmigrates from the future back into the past, triggering a violent chain reaction!

Naruto Uzumaki dies on the night of the Nine-Tails' attack, the night he was born. Countless members of the Konoha High Command are killed, the Five Great Nations of the Shinobi World are left in ruins, the Naruto faction is driven into exile, and the Uchiha come to rule Konoha completely.

The protagonist is an experimental subject created by the exiled Konoha faction in hopes of striking back. He was made by combining some of Naruto's cells with various other cells. When the experiment reaches its final stage, Black Zetsu and the Uchiha faction discover him. Black Zetsu does not kill him. Instead, he secretly increases the dosage, hoping to transform him completely and keep him as a reserve piece in case of unforeseen circumstances...