Konoha Uchiha's Counterattack from Scratch

He traveled through Naruto and became the Uchiha clan, but the system disappeared for three years! Three years later... "Congratulations to the host for successfully passing through the grinding period!" "The Eternal Mangekyō Sharingan has been obtained!" "The Mystical Technique of Miaomu Mountain has been obtained!" "... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.