Feng Xue walked while flipping through the "guide" in his hand, his eyes showing a hint of contemplation. According to the book, the Cultivation Technique practiced by the Demon Sect's members fundamentally differed from the typical martial artists. Their method was not written in words but transmitted via a method similar to imparting cultivation.
There had been heroes from the Righteous Path who feigned defection to gather intelligence. However, once one cultivated the Demon Sect's technique, it would drastically alter one's nature. Even the dearest of friends and family could be slaughtered mercilessly like crushing ants.
As a result, even after over two hundred years of struggle, there was still no accurate understanding. The description could only crudely classify them into four main categories: "Evil Gu Poison."
