Spirit beasts are a type of animal that possesses spirit power. The longer they exist, the more powerful they become. Therefore, from this point of view, based on number of years we divide them into five levels. Ten year spirit beasts, hundred year spirit beasts, thousand year spirit beasts, ten thousand year spirit beasts and hundred thousand year spirit beasts. Its meaning is just as the name implies: a spirit beast cultivating for over ten years, is a ten year spirit beast, and so on.