It's a Showdown, I Rely on My Disciples' Brains to Figure Out the Way of Heaven!

Li Xuanji traveled through time and was bound to a cheating system called "Being a Teacher". The system only gave him an aura of an invincible master that was "absolutely undetectable" and a dojo that was quiet, but it didn't give him any cultivation. He, a mortal, wants to pretend to be a peerless expert in the world of immortality!