After Three Years Undercover, I Became the Master of the Demon Sect.

Travel to a fantasy world with the Scum System in your mind! I thought I could cheat on elixirs, cultivate immortality, ride birds, and spend time with the fairy lady, but I was unexpectedly sent to work as an undercover agent in the Demon Sect. Three years and three years later, Gao Yuan has become the master of the Demon Sect. Facing the undercover agent who was sent to contact him, Gao Yuan killed him without hesitation, and said righteously: "Our demon sect wants to dominate the world!"