After Two and a Half Years Guarding the Celestial Prison, I’m Invincible!

Li Xuan transmigrates into a cultivation world and becomes a junior jailer guarding the Heavenly Prison. Fortunately, he awakens an invincible sign-in System. Within a certain radius, even if the King of Heaven himself showed up, Li Xuan would still be invincible. On the day he completes two and a half years of sign-ins, the demons break into the prison. Demon: “You ignorant ant! You’re asking for death!” Three breaths later, the demon decides to abandon the rescue of the Demon Lord and go back to appoint a new one. Demon Lord: “?…?”