Vaudevillain - VV4, 52 - Tone it Down

Zhou Xu, an interstellar military counselor, was selected by the “will not die in peace” system, and as a result, even though he had a great fear of pain, began his journey as villain, forced to die a terrible death over and over again. Zhou Xu, after going through a hundred worlds and dying a hundred times, finally changed. He wanted to retaliate!

When Zhou Xu crossed for the 101th time, an error occurred in the system.

Zhou Xu, ready for revenge, seized the opportunity, and at last, placed the system under his control.

Haha, Zhou Xu laughed. The villain had always been killed by the protagonist. Now, he would like to see who killed who.

Cruel and merciless shou vs domineering bully gong

- Description from Novelupdates

The end of the world is full of crises, but Su Chen says not to worry because he has the Red Alert System. That’s how confident he is. You say you have a lot of weapons? Sorry, I have more weapons than I can use here. Let me introduce you to the weather control device. You say the mutant beasts are very powerful? No problem, I have a way to deal with them…

Crossing to One Piece world, he became Roger’s younger brother.

'Confucius spoke not of the bizarre, the valiant, the rebellious, nor of spirits and demons.'This is the story of Mok Gyeongwoon, AKA the First Heavenly Demon - Cheon Ma, the forefather of the main character of the popular novel and manwha Nano Machine. This story is the prequel to Nano Machine, taking place 800 years earlier.