Margrave's Bastard Son was The Emperor - Chapter 244

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss.

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

I am the best when it comes to taking divergent paths. With just a flip of my hand, I shall take the path less commonly travelled. I search far and wide, only to find myself unbeatable and unrivaled. So now I ask, who else can match my awesomeness?

Acting tough is second nature to me and I am a lone wolf.

The road is long and winding but I shan’t feel lonely as long as I am able to act tough!

Life and death bore me and I do whatever I deem fit.

“Young man, way back when I started acting tough, you were still learning how to put on your underpants!” Xu Que thus decided to take the path of acting tough. He decided to act tough every single god-damned day. If he wasn’t acting tough, he was scheming for the best way to act tough!

- Description from Novelupdates

Reborn in the Naruto world, Shin Uzumaki finds himself in the doomed Land of Whirlpools. As a member of the Uzumaki Clan! Trapped in a world filled with war, betrayal, and unimaginable power, Shin’s survival seems impossible.. Until it isn’t!![Ding! Replication System Activated!][Daily Login Reward: Common Replication Card.]​​​​​​​[Newbie Gift: Perfect Sage Body—​​​​​​​Adamantine Sealing Chains​​​​​​​—​​​​​​​​​​​​​​Four Symbols Seal​​​​​​​]With the power to Copy any Ability—whether it’s the Kekkei Genkai or Rinnegan or Forbidden jutsu—Shin begins his journey to dominate the Ninja World. [First task: Save Kushina and prevent the destruction of the Uzumaki Clan.]