My Disciples Repay Me for Taking Them In: Each Has the Potential to Become a Great Emperor

【Invincible + System + Taking disciples + Decisive and ruthless + No saintly protagonist + Vast world + Face-slapping + Lighthearted humor + Recklessly charging protagonist + Misunderstandings that make people think he's a master strategist + No harem, one heroine or no heroine】 After transmigrating to a fantasy world, Qi Xiaoxu binds himself to the Strongest Disciple-Taking System! Whenever his disciples improve, he improves too. He can grant them magical treasures, pills, and cultivation techniques, and even get a critical-hit return! Most importantly, all his disciples have the potential to become Great Emperors, and their cultivation improves faster than a rocket taking off! 【Gave a disciple a first-grade Marrow-Cleansing Pill, received a critical-hit return: an immortal-grade Foundation-Nourishing Pill!】 【Gave a disciple the top-grade Dustless Sword, received a critical-hit return: the immortal weapon Immortal-Slaying Sword!】 【Gave a disciple the ordinary technique Falling Rain Sword Art, received a critical-hit return: the immortal-level Chaos Sword Manual!】 One day, after countless ages had passed, supreme overlords from across the heavens sparked a dark upheaval, and the Age of Darkness began! But at the edge of the heavens, one Great Emperor after another stepped forth, sending the River of Time into turmoil! “By our master's command, we shall suppress this upheaval!” “Those who incite chaos shall die!” If being invincible isn't about showing off, then what's the point?