The appearance of the Demon Clan is not particularly frightening; they look no different from humans. Just by appearance alone, one cannot distinguish who is a Demon Clan and who is human.
However, the aura of the Demon Clan cannot be hidden. Even the most ordinary humans who have never cultivated can feel that unsettling evil aura when facing the Demon Clan, which is something they cannot conceal.
During combat, the Demon Clan is accustomed to enveloping their entire body in black fog, which often carries toxicity. This toxin can erode a person's physical body and Spirit Mansion, making it extremely troublesome and difficult to dispel.
Once a person's Spirit Mansion is invaded by the Demon Clan's black fog, even an Advanced Cultivator will lose their combat effectiveness for several days. On a constantly changing battlefield, every Advanced Cultivator is extremely important, and losing even one could result in many of their own lower-level cultivators being killed by the enemy.
