I Am the Demon Emperor, You Say I Am an Undercover Agent?

Li Changshou was gifted, traveled through the fantasy world, and became an inner disciple of the Tiandao Sect. I thought I would be vigorously trained, but instead I was sent to the Demon Realm as an undercover agent, and was told that after my undercover service ended, I could become a true disciple. After working as an undercover agent, activate the "big villain system". After thirty years of being an undercover demon, Li Changshou finally became the Demon Emperor. But he didn't want to go back to Tiandao Sect. Just kidding, I have become the Demon Emperor, who cares about your true disciple? "Li Changshou, if you don't return to the sect, we will reveal your true identity." Facing the threat from Tiandaozong, Li Changshou said loudly: "I, Li Changshou, am the Demon Emperor, not some bullshit Tiandao Sect undercover agent." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.