I'll Play the Traitor, Bai Yueguang, Show Mercy with the Sword.

[Two male protagonists + traveling through books + cultivating immortals + pseudo-substitute + master and apprentice] I'm jealous of my own sand sculpture master being attacked by × a large-scale elite silly dog apprentice When Ji Huaijin traveled through time, it was the tenth year since Xie Zhiheng searched the three realms for his Master Bai Yueguang. And Ji Huaijin's soul passed through and became a master. Facing Bai Yueguang's "skin is not right for the stuffing", Demon Lord's apprentice examines himself three times every day: Should I keep him or not? To kill or not? Is he actually him? [System: Host, it has been detected that your target is undergoing a large-scale precision division in the brain. Your current survival rate is 0.00000001%] The system told Ji Huaijin that Xie Zhiheng's darkening value was 100% and he could kill people without blinking an eye, so he must be careful. As a result, Ji Huaijin was careful for several days and found that he really didn't blink - because Xie Zhiheng couldn't bear to close his eyes every time he glared at him. Xie Zhiheng: Call my name Ji Huaijin: Xie Zhiheng Xie Zhiheng: Okay, you are not my master Ji Huaijin:...? ?