Cold Husband, Don't Seduce Me - Chapter 21

The Mad Cultivator follows the tale of Ye Kong, a rude and vulgar thug from modern day China. While collecting protection fees, he was sent to another world! By the time he realized what was going on, he was possessing the body of an idiot. Watch as Ye Kong struggles against fate to climb the road to immortality!

- Description from Novelupdates

A 34-year-old NEET otaku, chased out from his house by his family, found that his life is reaching a dead end. He then recalled that his life could actually have been much better if he had made better choices in the past.

The overbearing top-notch beauty CEO wife turned out to be the terrifying and formidable War King!!A voice rose in Wu Jie's mind.Ding![Host becomes familiar with the system rules, sparking the first task: Earn a hundred thousand energy points within a week][Task Reward: One hundred thousand bonus points, unlocking the shop, one lottery draw][Failure Punishment: Clear all the host's bank savings]...“Damn it, I'm going all in!”“If I win, I'll get the beauties; if I lose, I'll work my hands to the bone! What's there to be afraid of with such a small task? I'll take it!!”

Flatten the Devil's Palace, eradicate the demonic cult, slaughter the demon lairs, sweep through the demon realm, dominate the heavens and earth, control the three realms, be the supreme master of the mysterious sect, master of the Nine Yin, the 17th head of the North Star Sword Sect, the Heavenly Fiend Lone Star, the Supreme Sword Soul, the Supreme Infinite Mysterious Heavenly Wishful Great Sword Patriarch... Also known as Iron Egg, known for the wild history of relentless killing.