Have you ever heard the story of the eight-tailed cat? Helping the owner fulfill a wish will give him an extra tail. When the ninth tail is still needed to become an immortal, in order to prevent the nine-tailed cat from being so powerful, Heaven stipulates that the last tail must satisfy its owner's wish, and the cost of realizing the wish is the loss of a tail. So the cycle begins over and over again, and it remains the cat with eight tails.
Purpose: Praise love and beauty