There is a saying among the people about the "Nine Demons and One Nightmare," meaning that even among nine demons, one might not necessarily produce a Nightmare. Nightmares are demons born from resentment after large-scale massacres. Their grudges never dissipate; they don't even remember that they are dead, and before they perished, they were consumed by negative emotions like hatred, anger, and fear.
"Not only that, they can influence the emotions of others, or even devour them."
Wang Han listened, completely bewildered. "You aren't reading that to me from some novel, are you?"
Chapter 626