Sorcery actually originated from the witchcraft of Huaxia and was transmitted abroad long ago. After evolving for hundreds or thousands of years in foreign countries, it gradually formed a school of its own.
Nowadays, most sorcerers who practice sorcery are cultivators from Southeast Asia. Although their skills are comparable to those of Ancient Martial Artists of Huaxia in ingenious ways, they are much more sinister, because they are adept at using the power of the curse.
The power of the curse is essentially an energy filled with necrotic energy, which is derived from the same source as Ye Chen's power of the Underworld God. In the hands of a sorcerer, it can be cast on an enemy without their awareness, killing them unseen.
When Ye Chen was waging battles across various continents, although he had never directly fought against a sorcerer, he had encountered similar symptoms: unconsciousness and black spots on the body.