I Have Suppressed Demons for Thirty Years and Am Now Invincible

"Sect disciple Ye Wuchen, who has blasphemed his fellow sect and has bad conduct, is hereby sent to the Demon Suppressing Valley for thirty years." Ye Wuchen, who traveled through time, was framed by his fellow sect members and was sent to the Demon-Suppressing Valley. In critical moments, activate the system. "Ding, it has been detected that the host will be assigned to the Demon Suppressing Valley. I hereby issue a mission. As a human being, I will suppress and eliminate demons and guard the Demon Suppressing Valley for thirty years." "Guard the Demon-Suppressing Valley for one year and be rewarded with the Emperor's World-Suppressing Technique." "Guarding the Demonic Valley for five years will reward you with the Green Lotus Sword Code." "Guarding the Demonic Valley for ten years will reward you with the Xuanhuang Exquisite Tower of Heaven and Earth." "Guard the Demon Valley for thirty years and be rewarded with the Immortal Killing Sword." Thirty years later, Ye Wuchen achieved great success in mystical skills and decided to return to the sect... When you look up, you will dominate the world. When you step out of the valley, you will be invincible. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.