Crazy Slaying Monsters, I Can Get Infinite Improvement

Chen Ning traveled to a world where demons were rampant, and after entering into spiritual practice, he unexpectedly discovered a mysterious palace in his Purple Mansion. As long as Chen Ning kills the demon, the demon's scroll will appear in the palace, and Chen Ning will receive rewards such as skills, magic weapons, and elixirs. Chen Ning killed the three-tailed fox demon and gained thirty years of skill. Chen Ning killed the hundred-year-old dragon and gained fifty-year power. Chen Ning killed the thousand-year centipede and gained a hundred years of skill. ....... While others are still practicing hard, Chen Ning has already dominated one side and is on the road to enlightenment and immortality.