Naruto: The Uchiha Patriarch

Uchiha Raizen awakens as Fugaku’s younger brother—an Uchiha destined to die in the coming massacre. Knowing the future, he abandons Konoha to survive. But after the clan is slaughtered, a mysterious system forces him back with one mission: Revive the Uchiha. Each new clan member grants him overwhelming power. [Clan Member +1 — Chakra +1 Kakashi Unit] [Eye Power +10 — Mangekyō Sharingan Unlocked] [Eternal Mangekyō Activated…] As the village watches and enemies scheme in the shadows, Raizen begins his rise—not as a survivor, but as the patriarch who will rebuild the Uchiha into the strongest force in the shinobi world. This time, the clan will not fall. — Description from novelcodex.org