After Escaping from Death, I Was Criticized by the Devil as a Substitute

[Two male protagonists + master and apprentice + training + stand-in + reunion + falling in love and killing each other + crazy criticism + double cleanliness] Shen Nanqiao has been a migrant worker in the world of immortality for a hundred years. Deceiving the master and destroying the ancestors, making sacrifices and self-destructing, every step is a "script task" arranged by the Tiandao system. After finally finishing the performance and receiving the box lunch, I was waiting to go back to my hometown to lie down with one hundred thousand top-quality spiritual stones. Unexpectedly, only five years after his death, the system suddenly popped up—— "Your former mission target [Apprentice Li Chenyuan] has been transformed into a peerless demon lord. He is gathering millions of demonic troops and wants to bloodbath the three realms and bury him for you." "Please return to your post quickly to stabilize the target's mood. The reward will be doubled, and a sea view fairy mansion will be given as a gift." For the sky-high pension, Shen Nanqiao gritted his teeth and returned to the world of cultivation. This time his identity: a sect servant with inferior spiritual roots. Mission: Sneak into the Demon Palace and appease the former apprentice. He originally planned to just deal with it casually, but because of a face that was very similar to the "late master", he was directly kidnapped into the Hall of Ten Thousand Demons. Forced to put on that white clothes, forced to learn that person's tone of voice, forced to be in front of that once cold and aloof young man—— Playing himself. Until the cold chains wrapped around his wrists, Li Chenyuan's eyes were scarlet and he roared hoarsely: "Smile, aren't you the most like him?" Shen Nanqiao: I don't just learn to look like him, I am who he is. But I can't say. After saying that, the spirit stone is gone. Later—— When the Demon Lord discovered that the substitute who gave up his back for a few low-grade spiritual stones, was greedy for money and was afraid of death, he was the Bai Yueguang who summoned souls day and night and offered sacrifices to the three realms. The sky fell.