Hell Prison Emperor: My Reincarnated Fairy Disciple Does Everything

In the chaos of the underworld where demons rampage and vengeful spirits rule without mercy, I stumble into an unexpected destiny. My first disciple? A reincarnated fairy with godlike powers. Can't cultivate? She teaches me forbidden techniques. Facing unbeatable foes? She crushes them while I watch. The throne of Hell sits empty? She crowns me Emperor whether I like it or not. Who knew being the laziest mentor in the Three Realms would lead to absolute dominion over the netherworld?