One Piece: New Order - Chapter 85: Oppression and Resistance

“For those who dare call themselves gods, I, Wen Ran, will crush their legacy beneath my feet. Even dogs are more honorable than those filthy bastards!”A feared Godslayer, who, due to betrayal, perished under the might of the heavens, having his world destroyed. Saved by a mysterious system, Wen Ran was granted a second chance at life but reincarnated in the body of a lowly slave. Hunted by the gods who sought his head, Wen Ran vowed to reclaim his title by showing heaven his vengeance as a 'God Slayer.'

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Being abandoned by his very own blood, the world stripped him of everything, his glory, his weapon, his beloved and even his name was taken away. He tried to reclaim what were rightfully his but the people already treated him as an outcast.With nothing left to do, he strode towards the place of no return and as he reached the deepest part by accident, he found a sealed casket with an unusual question engraved on its lid.'If the world's destruction would be put in the palm of your hand, how would it end?'Thousands of choices, hundreds of possibilities, and tens of answers, yet just one of these was certain.“I'll carve it with my enemies' blood,” he uttered underneath the moonless sky.On his hand was a blade made of glass, dripping with a crimson, sticky substance. In an era where war was an everyday occurrence and death was nothing but a mere consequence of being weak, his journey towards the labyrinth of revenge had begun.- - - - -Read at least six chapters and please be prepared to crave the rest. Enjoy Reading!

When the average man is suddenly thrown into a video game as an extra, fated to die, they might first think to hide or run away. But not Luka. A man now inhabiting the body, he simply wants to survive - no matter the cost - even if it means he has to kill the main character!