The demons inside the Hell Palace were brought in by Jiang Tang from other planes.
Despite their high abilities, even though they have entered the Hell Palace, their abilities are quite high. When faced with incoming cultivators, if they possess countering skills, they can definitely defeat these demons.
The skill Jiang Tang likes to use is definitely a counter to those demons. Initially, he didn't teach it to anyone, but eventually, he taught it.
In the library of the Saint Sect base, there is such a Buddhist spell.
Those who have witnessed the spell, upon seeing it, all followed to learn it for future prevention. When wandering the Martial World in the future, encountering similar demons, they can overcome them.
Although the Jiang Family members don't possess high abilities, having learned such formations and such spell abilities isn't very high either.
