Level 4 Human in a Ruined World - Chapter 317

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

Li Xuan traveled through the world of immortality and opened the apprentice system, and both apprentices and apprentices could be rewarded for upgrading.

【Ding! Accepting apprentice Qin Yue, reward you: Innate Divine Power]

【Ding! Accept the apprentice Zhao Tian, ​​reward you: call the wind and call the rain]

【Ding! Apprentice upgrade, reward you: space shuttle]

….

Li Xuan, who accepted a bunch of apprentices, evolved infinitely in seclusion.

Ten years later, the Devil Emperor invaded and wanted to sacrifice the whole world, but no one could stop it. The disciples watched the world fall into despair in pain.

At this time, Li Xuan appeared and slashed a sword against the Demon Emperor under the watchful eyes of the public.

Boom!

The sky fell apart, the invincible Demon Emperor fell on the spot, and the entire dark world was swept away by a sword.

The disciples were horrified. It turned out that the strongest person in the world was actually the master who had been in seclusion for ten years.

- Description from novelbuddy

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.

After hatching endless plots and suffering innumerable hardships, the demons of the Demonic Realm finally managed to resurrect the Ancient Demon King.

The demons of the Demonic Realm had hoped that the Ancient Demon King would not only lead them in waging a war against the Heavenly Realm and enable them to lord their superiority over the Immortals, he would also ultimately gain control over the entire realm.

Gradually, however, they discovered that their thoughts were very, very wrong.

Whilst it is true that this Ancient Demon King still retains his aura of superiority and possesses unlimited powers, he…

He seems to be a mental case…

It’s alright even if he changes orders and does things in an incomprehensible way.

But what’s with his habit of muttering under his breath, nagging and conversing with himself the entire day!

Small Orchid: He’s not ill, he’s just despicable (贱jian)…can’t stand to see (见jian) people live a good life.

Dong Fang: I am only unable to endure seeing you live a good life.

Small Orchid: …

*T/N: The Chinese pronunciation for the word “despicable” is the same as the word “see” – thus, the author is trying to show that Small Orchid, while trying to scold Dong Fang, is also careful not to incur his wrath, which is why she tried to imbue another meaning into her sentence after scolding him.

- Description from Novelupdates