We Promised to Save the World, but Why Did We Become Evil with the Master?

[Two male protagonists + Qiangqiang + Xianxia + dark villain + sword cultivator] The No. 1 Sword Cultivator Immortal of the Sword Sect, after his ascension failed, he was forced to have several apprentices by his junior brother. Junior Brother Head: Senior Brother Changling, do you want a disciple or not? Changling Immortal Lord: No need, thank you. Junior Brother Head: Keep it, just to relieve your boredom. Lu Changling succeeded in having an unreliable eldest disciple. The second disciple of Lijie, the villain of the ninth human emperor, He seems to be kind, courteous and thrifty, but he is the third disciple with the highest blackening value. The four disciples who were destined to be the sons of heaven and save the people, The young apprentice who uses the villain's blackening rescue system to purify his senior brother. Lu Changling taught and taught, and found that they had all turned black. Xie Xuesheng, Son of Heaven: So what if Master destroys the world and kills gods? They are the ones who are sorry for you. The young apprentice who was in charge of the system failed to save anyone in the end. Xunqing: Master, I am so tired. I want to go home. There is also a Buddhist cultivator who is always unkillable and keeps pestering him. Monk: "Donor, let me venture to say that you look like a very evil person." Lu Changling: "..." What a noisy bald donkey, wait until I find a chance to kill him. This world is full of madmen, but the path Lu Changling wants to take is his own path. He did not allow anyone to stop him on this road.