Naruto: The Uchiha Clan's Infinite Regression from the Night of the Massacre

Bad news: Transmigrated into the Uchiha clan with only three days until the massacre! Good news: Awakened a system that lets him lead the entire clan through infinite regression! When Uchiha Genji first regresses, trying to prevent the massacre, he's countered and killed by Itachi and the masked man! Little does he know, with every death, the entire clan's battle prowess is stacking up like crazy! The combat experience of a hundred elite warriors is shared among the whole clan! When everyone unlocks the Mangekyō, each member can manually construct a Susanoo, and they fight their way from the Night of the Nine-Tails all the way back to the Warring States Era! Now, standing before Uchiha Madara is the entire Uchiha clan, having endured ten thousand cycles, transformed into the ultimate strategic force! "Madara, this time, it’s someone else’s turn to dance!"