Guarding the Imperial Prison for a Hundred Years, I Emerge Invincible

Liu Yi transmigrates into the Great Shun Dynasty, where he becomes a jailer in the imperial prison. In this age of godlike martial arts and rampaging demons, Liu Yi is born frail and unable to practice martial arts, and lives in constant fear. Fortunately, an unnamed book changes his fate. “Guard the Toad-Summoning Demon for thirty years and receive the reward: Golden Toad Swallows the Sun, a thousand years of martial arts cultivation!” “Guard the Extremely Wicked Old Demon for fifty years and receive the reward: Divine Ability: Demonic Flames Engulf the Heavens!” “Guard the Saintess of the Moon Zen Sect for seventy years and receive the reward: Divine Ability: Annihilation Heavenly Blade!” A hundred years later, demons wreak havoc and breach the capital of Great Shun. The dynasty is in peril. Beneath the imperial city, Liu Yi, who has guarded the prison for a hundred years, suddenly opens his eyes. “You insignificant demons dare disturb my cultivation!”