Naruto: My Ninjutsu Has Been Blackened

Upon waking up, Mu Feng found himself in the world of Naruto and a member of the Uchiha clan. Being in the same class as Obito and Kakashi, Mu Feng felt immense pressure. Fortunately, he had linked himself to the Darkening System, and the ninjutsu, taijutsu, and bloodline limits he had learned were instantly darkened and enhanced. [Ding, your 'clone jutsu' feels you're too weak and is darkening. You've acquired a perfect-level clone jutsu!] [Ding, your 'chakra' feels insulted and is darkening towards 'chakra'!] [Ding, your 'bloodline' feels scorned and is darkening! You've activated the Three-Magneto Sharingan.]...Shinra Tensei, Chibaku Tensei, Rinnegan...After Mu Feng mastered these ninjutsu, the ninja world gained a supreme power.