Evil Disciple, My Master Is a Serious Swordsman

[Demon respects students + Master and apprentice taboos + Dark-bellied male protagonist + Cold Master + System] In his previous life, Shen Du was an abandoned disciple of the Tianjian Sect and became the Eternal Demon Lord. However, on the day he reached the peak, he saw his master Su Hanyan blocking the Demon-Slaying Sword for him. When he opened his eyes again, he went back to the day when he became a disciple at the age of eighteen. In this life, he will not be a chess piece, he will not believe in hypocrisy and righteousness, and he will not allow anyone to touch Master's hair again. At this moment, the "Master's Enlightenment System" awakens: by changing your destiny and winning the Master's trust, you can unlock the magic skills, magic weapons and secrets of the past life; if you let Qing Leng Sword Fairy make an exception for him, the reward can be doubled. As a result, the docile and polite little apprentice became increasingly uncomfortable. The genius of the sect had a sword debate with him, but his heart collapsed the next day; the elder secretly set up a trap, and in the blink of an eye he lost his entire family; even the supreme leader of Tianjian Peak was forced to retreat step by step by him. Su Hanyan held his sword against him: "Evil disciple, what do you want?" Shen Du leaned over and chuckled: "There are two immortals and demons, as well as Master."