All My Junior Brothers and Sisters Are Overpowered

With the System's help, Bai Yun becomes the sect leader. The System tells him to prepare for the coming battle against the evil forces from beyond the realms: he is the last hope. He initially assumes that the junior disciples the System provides after he completes its missions are just high-level NPCs. But little by little, he realizes something is wrong. These junior disciples are exactly like the characters in his dreams, and their emotions feel far too real. As the sect grows, Bai Yun's strength increases, and when the crisis finally arrives, he at last understands everything. This is my first time writing, so please support me. I'm not good at writing blurbs; please read the story.