After Becoming the Final Boss, I Pretended to Be a Spiritual Master

[Through the book➕Spirit Master➕Villain➕Strong Female] I passed through the spirit-controlling article I wrote and became the ultimate evil spirit that would eventually be destroyed by the male protagonist. On the night when the strangeness came, the system forcibly bound: "Please disguise yourself as an F-level spiritual master and sneak into the human camp." Looking at the pale and gloomy face in the mirror, I silently wrapped my windbreaker tightly around me. When the male protagonist's silent spiritual sword was pressed against my throat, the system alarmed frantically. He asked coldly: "The hand that tore apart the S-class evil spirit is yours, right?" --And the palm hidden behind my back is seeping black mist. To make matters worse, the evil spirit I contracted suddenly spoke: "Master, the smell of his soul... Is so familiar."