The disembodied voice of Caius tells his master that he cannot let the demons go into the other side of the void. He says that a lot of them have reached the stage of immortal and immortal prime, and that if he eliminated all of them, how long would it take them to get back to their former state? If they took 500 years, he says, then he would have to seal the gap between heaven and the other worlds for 10,000 years. He tells Caius to go back now, to solve the problem of the four-sided universe. He warns Caius not to believe in his master, because he has been thinking about this for a long time. The universe is in a state of disarray, and he says that he will purify it with his sword. He hopes that the lost souls will return home in peace, but he adds that only one-third of the demons have been eliminated. He wishes that he could purify the universe with his own sword, but that would still not be enough. He wants to seal up the gap first, and