7th Demon Prince Jilbagias' Chronicle of Demon Kingdom Toppling - Chapter 89.1 - Price of Sin

Rael screwed up badly. One reckless gamble later, and his guild's entire emergency fund was gone. With debt collectors ready to harvest his organs, his only hope was a single, desperate gacha pull.Ding![Congratulations! Player: Quarterpounder69 has obtained the (Divine) Grade item, Eye of the Beast!][Divine Grade item obtained! All Stats +250][First Divine Grade item obtained! All Stats +100][New title unlocked! [Heavenly Attraction] (Divine)]With no other choice, he consumed the item—only to be thrown into a situation no player had ever faced before.[To ensure fairness, please select a random number. This will determine which boss monster variation you become.]'Uh, I don't fucking know? 69... hmm, maybe not...'[Confirmed.]'Wait—'[Congratulations! You've chosen the Special-Type Boss Monster Variation: The Pay-to-Win Boss.][Congratulations! You've become a Boss Monster!]Armed with broken perks like [Premium Leveling], [Premium Evolution], and [Premium Shop], Rael was thrust into the world of the VRMMORPG game he had been playing.The issue was, he went back in time, specifically, 150 days before the launch of version 1.0.

A master assassin transmigrates into an interstellar era.

Other players were responsible for competing in the e-sports arena, while he was responsible for stringing up and beating up the other players.

His sword was hidden during the peak of day, and he was a gentleman who arrived in a flash of light;
As a vanguard of the eternal night, he was the variable between life and death in the world.

“As you know, the Star League’s difficulty levels are arranged in this way:
Paradise < Simple < Normal < Difficult < Nightmare < Hell < [Tyron Odin]”

- Description from Novelupdates

Link’s soul traversed into the Wizard World, delightfully obtaining the Krypton Card Drawing System.

With his first draw being the “Mind Closure Technique,” his cultivation progress far surpassed his fellow apprentices.

He conducted research, carried out experiments, published papers, and obtained patents.

In this highly advanced civilization of a fantastical world, he climbed to the peak step by step.

He campaigned across the Heavens, admired countless bizarre landscapes, and conquered one innovative civilization after another.