Blood sacrifice? thought Xia Jingyu. She nodded. "I vaguely know about it. Sometimes, in order to summon an even stronger entity, ghosts will hold a blood sacrificial ceremony. By offering the flesh of strong living things, the ceremony will be completed. However, there are many different kinds of blood sacrificial ceremonies. We cannot know what kind of ceremony they might be holding."
Su Yu's eyebrows twitched. "In other words, hiding here will be safer for us."
After thinking for some time, Su Yu took out a droplet of the earth energy channel's spiritual liquid.
"Swallow this," he said. "I'll help you to make your body feel better." He sat down with his legs crossed.