I Was Harmed by the System at the Beginning

When he was about to die, he was bound to the [Ten Thousand Realms Monster Trading System]. As long as he sold monsters, Lin Chen could improve his cultivation. Lin Chen thought that he would soon become the number one demon dealer in the world! Until one day, he discovered that many of the monsters he sold had too clear eyes, and even retained human habits and memories! The system warning was cold and bone-chilling, and the murderous intentions of the former patrons were revealed... The system, humans, immortal sects, Hades, demons... Looking at all the worlds, Lin Chen found that he had no friends, only enemies! When the only way to survive was paved with the flesh and blood of innocent people, Lin Chen clenched his sword tightly. He wanted to defeat the sky with his own strength! Change your life!