After the System Awakens, Even the Immortal Emperor Has to Be Slapped Twice

[Single heroine + system + invincibility + rebirth + fantasy] Lin Yun woke up and traveled through the fantasy world. Before the system awakened, he was just a pawn for others. When the sect encountered a crisis, Lin Yun was unwilling to be a pawn but awakened the God-given system. As long as you are a practitioner with a comparable level of cultivation, you can obtain Heavenly Points by killing them, and you can also improve your level of cultivation. Can you get random rewards by helping people with great luck? What? There is also a mandatory task, asking me to slap the Demon Emperor twice? Reward the Immortal Emperor for his cultivation? "Then what are you afraid of? I, Lin Yun, have to show this devil emperor a slap as big as the sky today." After saying that, Lin Yun rolled up his sleeves and walked towards the terrified Demon Emperor...