Subjugating Demons: I Still Enjoy It as a Non-Staff Person

The world is in chaos with monsters, Kyushu is overthrown, and human life is as worthless as grass! Lu Chuan was born in this world and became an inconspicuous sidekick in the Demon-Suppressing Division. He has no background and no talent. His only wish is to get a place for initiation, unlock the golden finger with him, and live peacefully in the world. Unexpectedly, in an accident, he accidentally swallowed the golden elixir and his life span was short! I wanted to break the pot and die happily, but I accidentally discovered the real magic effect of the golden finger. Killing demons can directly increase your longevity and Taoism! By killing the demon, you can plunder the demon's innate magical power! [Hundred-Eyed Ghost Boy]? Cut! Awakening to break the illusion and trace the source, uncover the illusion in the world at a glance! [Millennium Tree Spirit]? Cut! He is in charge of cutting off the wood and continuing the yang, and the sword will take away the life and good luck! Ten Thousand Years Turtle Spirit? Kill! Forged into a golden body for a hundred generations, no matter how powerful your magical power is, it will not be harmed at all! Since then, there has been a madman in Kyushu who proves his way through killing. I don't care if you have demons and monsters that reach the heavens, and there are thousands of immortals and Buddhas behind you. Anyone who dares to stand in my way will be slaughtered! You ask me why a non-staff person works so hard? Lu Chuan put his hands behind his back and replied indifferently: "Your lives are all for me, Lu Chuan, to attain immortality!" Until later, Lu Chuan looked at the empty demon cave in the Demon Realm and couldn't help but sigh: "There are still too few demons in this world. How can I achieve immortality?" "I can't help but kill the demons in this world. How can I understand the supreme method?"