Beast Tide Surging

From the birth of human beings to their gradual growth, there has been constant war between the orcs and humans... Originally, the strength of both sides was in a stalemate, and no one could really pose any threat to the other. But since the emergence of the third generation of beast kings, the combat power of the entire beast group has skyrocketed in an instant! Humanity has been retreating steadily, and now only four large cities remain in the originally vast territory! The city is surrounded by high and thick steel barriers, but life inside is not easy either. Every replacement of the beast king will enhance the fighting ability and reproductive ability of the beast group. The fourth generation beast king, whose fighting power was so strong that people can't breathe, has just disappeared, and the beast tide outside the city has receded a little. But... Will the stable days really last? No one knows whether the next invading herd will tear through the city's iron armor.