Jiang Lin transmigrates to Konoha and becomes an unremarkable member of the Anbu.
The story is still in its early stages: the Konoha Crush Plan, Pain’s invasion of Konoha, the Fourth Shinobi World War... Ordinary shinobi can only end up as cannon fodder.
Luckily, Jiang Lin awakens the Upgrade Trait System.
[A Few Parlor Tricks (White) upgraded to Taijutsu Master (Gold)]
[Good Memory (Blue) upgraded to Photographic Memory (Gold)]
[Ninjutsu Proficiency (Green) upgraded to Ninjutsu Instructor (Gold)]
[…]
His first order of business is to use the infamous old villain Danzo as a punching bag to level up!
Then Jiang Lin buckles down and trains, growing stronger and stronger until his name is known across the entire shinobi world.
Kakashi: Stop calling me the Copy Ninja. Jiang Lin is the real Copy Ninja.
Jiraiya: I trained Naruto for three years, and he surpassed me after just a few days of training with Jiang Lin?
Orochimaru: Why bother researching Living Corpse Reincarnation? I should just ask Jiang Lin to teach me his body restoration technique!
Madara Uchiha: Stay away from me!!!
…