The Demon King's Strategy Manual for the Sword Master

[Villain (micro-villain slowly deteriorating) + system + cultivating immortals + double men + double cleansing] (Eat with confidence, the ending is guaranteed, as for the middle... Just watch it later) What should I do if I travel through time and become the final BOOS of a female channel novel? I thought I could kill the male protagonist and the female protagonist in advance and then live a comfortable life, but I didn't expect that the system asked me to lead the protagonist to grow up? Okay, for the rest of my life I won't have to worry about food and clothing... I'll bear it! Wait, why is this guy looking at me more and more weird? I understand... His rebellious phase has arrived! It's not easy to raise children. —————— At this moment, Wu Yao unexpectedly awakens, and the memories of this life and the previous life are intertwined. This time, the tragedy will not happen again! ———— "Forgive me Xiao Yao, this is the last time." ———— What? You want me to give you that kind of thing and also want me to delete this memory data? No, if the host finds out, he will kill me! "The choice is yours, whether to complete our deal as I said and complete your so-called mission, or just watch the world collapse completely." ———— "Xiao Yao? I didn't expect that the leader of Zhengdao now knows how to use poison? My teachings to you are not in vain..." "Poison? Brother Xu, do you think what I fed you was poison?" Su Zhixu was stunned when he heard this. A bad thought came to his mind and he looked at the man's eyes: "Is it that kind of thing?" "Brother Xu still understands me." "Who taught you to do this!" "What Brother Xu said... Isn't the way I am now exactly what you taught me?" No, who taught you how to poison such a thing! Later the protagonist becomes a demon