Khalifa: Queen in the Apocalypse - Chapter 198: The Betrayer

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- Description from Novelupdates

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

[R-18, Mature Element Warning!] [Multiverse!]A young man with a questionable job dies, eaten by a shark. To his surprise, afterlife was a spinning roulette that decided his next world and powers, with an annoyed Goddess supervising the process.The Gamer System welcomes him with open arms, and he shivers in the endless potential it holds. If used right, he knew The Gamer could step beyond even Godhood. Beyond God.Out of desperation, that was exactly what his goal became. The Goddess was a snitch, and now she and her fellow Gods wanted him dead. What, and why?In the end, [Soul 799], soon to be renamed as [Neji Hado], becomes a Cursed Soul.-—-Tags: Gamer-System, Gray-MC, Harem, Incest, Mature, Multiverse, R-18, OP-MC, World-Hopping.First World: My Hero AcademiaSecond World: NarutoThird World: Fate/Grand OrderFourth World: High School DxD

Young Lin Yi, betrayed by his beloved, had his core taken away and became a pariah despised by all.At a fortuitous moment, Lin Yi acquired the ancient legacy 'Chaos Sword Body Technique', rising against the odds to embark on a path of revenge!“Those who have wronged me, Lin Yi, shall be repaid a hundredfold!”