There were many monster beasts in Beiyan Empire, which could be roughly divided into nine levels, the higher the level, the stronger the strength. Among them, the first-grade monster beasts were as powerful as masters at the first to third layer of body cultivation. Those in second-grade were equal to human beings at the fourth to sixth layer, and the third-grade were the same as the seventh to ninth layer, and so on. According to legend, monster beasts that surpassed ninth-grade could turn ...