Legend has it that a cat with two tails will become a demon, eight tails will become a spirit, and nine tails will turn into an immortal. After giving birth to the nine tails, one has to find a destined person to fulfill a wish, but then the ninth tail will fall off, and the cycle starts over again.
Ling Miao shook her nine tails and teased the baby in the cradle, using this as an example to tell him, "They are all lying to fools."