Completed[Yandere + System + Book-traveling + Mind-reading + Male-female swapping + Funny sand sculpture + Saving the villain]
Ning Xianyu, who crossed into the cultivation world, activated the "Wish Fulfillment System" and made her first wish: "I want to be invincible!" When she wakes up again, she finds that she has swapped bodies with the sickly master of the demon sect. Not only that, but the master can also hear her inner dialogue with the system. The dead demon lord tries to break his persona but uses her body to threaten her into keeping his image intact.
With an unreliable system, a lazy fish who wants to rise to the top, and a bloodthirsty, sickly master, Ning Xianyu embarks on a humorous and absurd cultivation journey.
Sickly Master: "Shut up."
Ning Xianyu: "I didn't say anything."
System: "…It was me."
[Fantasy, Romance, Comedy, Reincarnation, Action]