Harry Potter: A Certain Ancient Rune Professor of Hogwarts (TL) - Chapter 76

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Nagasawa crossed to Naruto Universe and was bound to Konohagakure.If Konoha is severely damaged and destroyed, Nagasawa’s lifespan will be reduced.He panicked at the thought of the upcoming Nine-Tailed Demon Fox's attack , and the thought of Konoha getting destroyed left him in despair.Fortunately, while bound to Konoha, he can obtain templates of powerful characters.At the beginning, He got the Whitebeard template! Since it's the Whitebeard from the Summit War of Marineford, he can use Tremor-Tremor Fruit's ability and Haki.Facing the Tailed Beast Ball, which terrorized Konoha Shinobi, Nagasawa leaped and shattered the Tailed Beast Ball with one punch!

He stomped his feet and the land collapsed, looked above and the sky shattered, reached out and captured the stars in his hands.

He possessed the body of the bullied and ostracized Esdras Varthos, who had the lowest talent among his peers and was sold to the mages tower by his sly relatives to steal his title and lands.

Esdras used his powers to divine the fate of the world, and saw a terrifying scene, the apocalypse was about to start.

This world was going to be destroyed in an epic battle between gods, demons and titans.

As an ant he was fated to be a squashed under their feet.

There were a total of eight shards scattered and hidden in the universe, his only hope was to collect them all and ascend to divinity himself before the apocalypse. He was not willing to be an ant for long.

He already had one shard of a divine spark!

[You have gained 10 EXP]!

He will travel to many different kinds of worlds in the universe seeking the divine shards.