The term "evil spirit" was something he had heard of by chance when he was a child.
At that time, his pair of Spiritual Eyes had just been accidentally awakened, and he had gone through a terrifying acceptance period.
Later, he met that crazy Daoist, who finally brought him some peace.
It was also from his mouth that he heard this term.
The reason it left such a deep impression was simply because the powerful Daoist, as he knew him then, had a terrified expression on his face when he mentioned this term.
The Daoist had once solemnly told him that most people might never encounter it in their lifetime, but if a spiritualist did come across it, it was both an opportunity and a disaster.
Generally speaking, few who mistakenly enter the realm of evil spirits manage to escape.
As for more information about the evil spirit realm, the Daoist clearly didn't want to mention it again.
