In this chapter, we learn that the "devil" was probably a "xuan-grade" pharmacist, and that the poison that he used was so powerful that it boosted his own power. We learn that he's also an "earth-grade pharmacist" , which means that he has a lot more power than his brother-in-law. This is a big deal, because it means that the two of them are now at the top of their game.
In this chapter, we learn that the "devil" was probably a "xuan-grade" pharmacist, and that the poison that he used was so powerful that it boosted his own power. We learn that he's also an "earth-grade pharmacist" , which means that he has a lot more power than his brother-in-law. This is a big deal, because it means that the two of them are now at the top of their game.