Douluo Dalu - Chapter 77 — Vigorous God, Grandpa Really Came

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

All of a sudden, various watches appeared out of nowhere in different parts of the world. These locations were quickly controlled by various organizations, and then the marketing of the watches was strictly controlled.Why was this? Because these watches gave access to a unique world: Eternity!Eternity functioned more or less like an open-world game with a single-player mode, except that Eternity was a game where you could actually die!By joining Eternity, everyone awakened a unique talent.This talent helped unlock the first classes, which allowed you to strengthen your physique both in Eternity and in the real world!Not to mention the various skills and talents available...And above all, there was the legend that it was possible to become immortal thanks to Eternity!It was with the aim of changing his destiny that Maxime trained his whole life in swordplay, and for many years saved his meagre salary to obtain one of these famous watches!Watch his rise in the real world thanks to Eternity!

Thousands of years ago, a small planet collided with Earth and destroyed the world. In five days, ninety percent of humans had been wiped out, leaving behind the last ten percent to earnestly struggle on death’s door.

Jinyu was one of those people who survived. Due to a special heredity trait, he could understand beast language. After the apocalyptic disasters, Jinyu had been living for a month with the few small beast brothers that he’d subdued. Previously, Jinyu had thought that he would live like that until he died. Yet, inexplicably, one day he opened his eyes to find that he was in a monstrous, lawless world that was full of vitality and life.

Jinyu’s transmigration into the future let him skip over almost one hundred thousand years. In the year 106825, beasts rule the galaxies and ‘pure’ humans are extinct. As the one and only ‘pure’ human left in the entire universe, Jinyu braves this new chaotic world to find a place for himself and thus begins to work at Beast Store number 138.

- Description from Novelupdates

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.