The Mad Tycoon of Rome - Chapter 279:

A master assassin transmigrates into an interstellar era.

Crossing into the world of Naruto, and acquiring the One Piece system, with all the powers of the world of One Piece, swordsmanship, devil fruit, domineering.

-Do you think that your fire is very powerful? I have the burning fruit.

-Do you think that your thunder is very powerful? I have a thundering fruit.

-Do you think that your otter is very powerful? I have the frozen fruit.

-Did you said you want to die? Don’t worry, I also have a nickname: Death Doctor.

- Description from Novelupdates

A college student, accidentally reborn into the world of Naruto, becomes a member of Uchiha who is destined to be exterminated.

In this cruel ninja world, in the face of endless wars and exclusion from the village, what will Uchiha Qing do?

PS: Later in the book, the protagonist will develop a system of immortal cultivation. Cultivating Immortals in the Ninja World, have you seen it?

- Description from novelbuddy

Waking up in a carriage, Wang discovers something was wrong. But due to weakness he finally finds himself in an ancient room. From the moment he comes to terms with his transportation, he has to do everything ti become stronger, due to fear of being killed off anytime.

As someone from Earth, where people had more freedom, he did not feel very safe in a world where slavery still existed with martial arts masters roaming around.

When he discovers the existence of an attribute panel, he decides to take the invincible road.

But things don’t go his way when he survives in the hidden realm with his family only to be ejected into an unfamiliar savage world dominated by the monster clan.

Having to protect his family and become strong while surviving in a world dominated by a simple rule, the strongest fist is the law.

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