Something's Off About My Master

(Winner of the 2021 Million-Word Original Fiction Contest)

From the day she began cultivating, Lin Xi told Yun Changsheng,

"Cultivators must cast aside the seven emotions and six desires if they hope to attain the Great Dao."

Many years later,

Lin Xi was tainted by demonic energy, fell into darkness, and became a demon.

She pinned Yun Changsheng into a corner and lifted his chin with a slender finger.

"Master, cultivators must cast aside the seven emotions and six desires!"

"I was just saying that for fun."

"...?"