Extracting Billions Of Toxins And Tempering An Unsullied Body - Chapter 3 - Searching for Treasures in the Library Pavilion

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Son of a bitch! I just finished this godawful fantasy novel, and now I'm knee-deep in it – as David, the disgraced son of the Solarian Empire's top general! Talk about some twisted cosmic joke. But hold on a damn minute... maybe this isn't all bad. Armed with the knowledge of that trashy plot, I can become the ultimate shadow player, an overlord perhaps. Screw the damsel-in-distress harem too – it's time to pull the strings and become the real power behind the throne. This isekai might be a steaming pile, but I'm rewriting the ending with a little more... Debauchery (wink wink).

I was playing a boring game where you don’t level up no matter what you do, there’s no event happening and it was even FREE on *** store. I had an argument on relationship stuff, was angry and decided to destroy the village in a game, then a notification pop-up…

-Your karma has increased by 10.

-You are now at level 2.

Graphics of the game changed. Acquired magic. Saved a village girl that was chased by bandits. Gained a cultist.

It seems the events are starting to take place. Lets see what happens…

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy