The snake's weakness lies in its heart, which is the weakest part of the snake. If you want to destroy the giant snake, aim for it's heart. This is why the family likes to sneak attack people. The boy says that the family is nothing but a "young lady" and that if he were to hurt him, he would be dead. The young lady says that she is from the family and that it would be better not to get involved in this time. He says that he wants to kill the snake for his benefit, not for the sake of saving him. The snake scales are short, he says, and he has some good use for them. The old man sword isn't bad at all. It's the sword of "the legendary king of martial warrior world" . He's going to temporarily take the aura under control of the girl. The elder brother says he'll help the girl use the pill. The younger brother says the elder brother owes him an explanation. He doesn't want his brother to become a "martial warrior," he wants him to be an ordinary person. The older brother says that his plan was to lure the younger brother to fight against a giant snake in hopes that the snake would be killed, but the snake didn't do so. He also says that if his brother's been in danger, the poison that he took was cured only by a "thousand-year old spirit beast" , not a "grand master's" snake. He explains that he wanted to get his brother killed so that he wouldn't owe him what his parents owed him.