These are the Low-level Demon Race recorded in ancient texts; they cannot even form a proper shape, their pupils are pale purple, their attacks are ordinary, their defense is moderate, and their intelligence is practically zero. They only know how to attack according to the sound cues of the demon flute, and their attack methods are monotonous.
However, they are not without weaknesses. For instance, their glabella.
That is the vulnerable spot in their defense; as long as that area is injured, it is a one-hit kill.
Chapter 329