The reason why Zhao Hai was telling Lei gang so much was because it was useless even if Lei gang knew all this. First, even if Lei gang had really killed 10000 people and could control his killing intent, his martial arts had already reached such a level. Even if he could control his killing intent, his martial arts cultivation would not improve too much, and it would not be of much help to him. Although the blood massacre sect's cultivation technique required killing intent, it was the same. After reaching a higher level, killing intent would become a burden. This was also the main weakness of some demon sect techniques.
The demonic sect's cultivation techniques generally used some special methods to stimulate themselves so that their cultivation speed would be faster than ordinary righteous cultivation techniques. However, it was precisely because they used these special methods that these special methods would become their burden and limit their achievements.
