Megara Uchiha: Unlimited Upgrade System

During the Third Great Ninja War, an average Uchiha Member quickly becomes the strongest in the entire Ninja World. Even the Golden Flash was suppressed by him. He and with the help of the system, he becomes the most powerful Ninja in existence. Instant Upgrade is his ability. When he Instantly Masters a Jutsu, it increase his power with that Jutsu to the Extreme. The most evil Uchiha that has ever been born. A man not even the Ōtsutsuki can defeat.