No More Pain For This Villain. - Chapter 225 Kingdom’s Secret.

Lin Youning had spent her life in hardship, enduring everything until her son finally became the top scholar. Just as she was ready to enjoy her twilight years, Gu Yixuan’s visit made her so furious she choked—and died.Reborn, Lin Youning has only one goal: to live well and die of natural causes.

When an era came to an end, various forces set foot in cultivation to compete for immortality. A young boy who spent most of the time sleeping got lucky in the troubled times and became an unparalleled immortal who could cover the sky with a snap of fingers. Was he going to live forever?

- Description from Novelupdates

Harry was just an ordinary young man—until he stumbled upon a hidden world where the strong reign supreme, and Cultivation is the way to power.But fate had greater plans for him. Granted a God-tier system, he soon discovers a terrifying truth—his path to power lies in slaying beasts.[Congratulations, you have slain the Deathless Dragon.][You have reached Elemental master Realm][Congratulations, you have slain the Lion Emperor.][you have reached celestial sage realm.]While others were busy cultivating for years to level up.Harry was killing beasts.“You beasts are nothing but free exp”With each kill, his Cultivation increase, his abilities evolve.But Humans are not the only race in the vast universe, Earthlings got in fight with Dakis that gets strong by eating humans.Will Harry lead the Humans to victory or will get devoured by a daki.

A man reincarnates in the body of a boy who suffered a tragedy, only to realize that he is in the world of My Hero Academia. What's even stranger is that his quirk seems to have the abilities of Nen and Haki.