Naruto: My Ninjutsu Has Turned Dark

When he woke up, Mu Feng discovered that he had transmigrated into the Hokage world and become a member of the Uchiha Clan. He was in the same year as Obito and Kakashi, and Mu Feng felt immense pressure. Fortunately, he had bound himself to a darkening System. The ninjutsu, taijutsu, and Kekkei Genkai he learned would inexplicably darken and grow stronger at the drop of a hat. [Ding! Your 'Clone Technique' thinks you are too weak, so it has darkened. You have obtained Perfect Clone Technique!] [Ding! Your 'chakra' feels insulted and is darkening into 'chad-ton chakra'!] [Ding! Your 'bloodline' feels scorned and has darkened. You have awakened the Three-Tomoe Sharingan.] ... Shinra Tensei, Chibaku Tensei, Limbo... After Mu Feng mastered these ninjutsu, the ninja world gained a supreme powerhouse.