Ziqian is getting ahead of himself. He's drinking the blood of the snake and the sacred blood. He wishes that he could give the snake back to the blood devil, but he knows that he's going to be caught between the two. He can't count on himself, he says, because if he gets caught, he'll either be killed by the snake or killed by a blood devil. He says that he drank the blood from the sacred trees so that he would have the ability to borrow the spiritual force from the gods. The sacred trees are the only place where humans and gods can communicate. In ancient times, humans prayed to the trees to tell them what they wanted, but later on, humans could threaten the gods, so they ordered their men to the sacred tree. The spiritual force on zhenwu was drawn out, and humans could never again surpass the limit set by the gods in the constellations realm. If you're a saint, you'll have the power to borrow from the god's sacred trees. The only problem is that you don't know how to use it.