The Scum Is A Nemesis 

Xiao Ling's expression changed after he heard what his master said. "Master, you mean that only the recent spirit servants had this milky white spiritual energy in them but the rest in the past don't have?" he asked as his eyes widened in surprise. He looked at his master for confirmation. 

"Yes." Cheng Sheng nodded in affirmation. "If the spirit servants and Devouring Worms that attacked us in the past had this milky white spiritual energy, we would have long been poisoned by the enemies." He said and sighed. Fortunately, the enemies were just testing their strength in the past. "The enemies' spiritual energy is the nemesis of our spiritual energy." He told xiao Ling. 

"Then, now…" xiao Ling's expression turned serious.