In this chapter, we learn that the dragon clan has a lot of power, but it's not nearly as powerful as they think it is. This means that, even if they wanted to kill you, they wouldn't be able to because there's a loophole in the laws of nature that would allow them to do so. The only thing that would keep him from killing you right now is that you're so powerful that he can't do anything to save you. So, he's going to have to kill him.