"How exactly is this Heavenly Thunder Pill controlling these Blood Pill Slaves? We know that ordinary alchemists control Pill Slaves by using pills as their energy source, but clearly, there's no trace of pill energy inside these Blood Pill Slaves at the moment. It's as if they are using their own energy. This scene is quite interesting. If I could understand this, perhaps my Spirit Pill Slave will make significant progress!" Du Fei pondered, staring at the battle circle before him, ...