Naruto: From Copying Attributes to Slaughtering the Shinobi World

After unexpectedly arriving in the world of Naruto, Uchiha Sen has no choice but to train desperately just to stay alive. Calling Danzo a eunuch nearly gets him assassinated-and then he is sent to the battlefield as cannon fodder.

Fortunately, he awakens a system: after every battle, he can choose one of his opponent's ability traits.

[I choose Uzumaki Physique.]

[I choose Mental Power +1.]

[I choose Physique +1.]

[I choose the Eight Inner Gates!]

[I choose the Flying Thunder God Technique!]

At first, Shimura Danzō is delighted, convinced that the Second Great Ninja War will get Uchiha Sen killed. But none of his early schemes manage to finish Sen off. Instead, they help him awaken the Mangekyo Sharingan.

Years later, Sen stands atop the Hokage Building, laughing uproariously at the Shimura and Sarutobi clansmen below.

"Shimura Danzō! Sarutobi Hiruzen! This is your teacher, Senju Tobirama, right? Watch closely! Today, I'm going to whip his corpse and show you something you've never seen before!"

Sarutobi Hiruzen and Shimura Danzō stare in fury, their eyes almost bursting from their sockets. "No! Stop hitting him!"

Uchiha Sen gives them a wicked grin. "All right. I'll stop."

"After all, whipping a corpse isn't nearly as satisfying as whipping a living person."

Sen casually resurrects Senju Tobirama, then hands the whip to his fellow Uchiha.

"Come on. Everyone gets a turn!"

"Oh, right-hurry up and resurrect old man Setsuna. Let him get a few lashes in, too!"

P.S. Expect ruthless scheming and battles of wits early on, followed by an unbeatable protagonist in the middle and later arcs.