Shadow Tongues. This was a skill which allowed the hunter to curse a person. Their skills were varied; while some used blood, some used hair and dolls. It was really hard to detect these hunters from the common people, and unless they went to the council and got themselves registered, no one would be able to find out that a person had awakened.
In the past, the council did have a lot of trouble due to the Shadow Tongue hunters refusing to register, and ever since then, the regulations have tightened a lot to make sure that no awakened hunter would be left unregistered. However, there were always some sly ones who would somehow manage to escape the registration. And given that Ye Jinglan might have awakened before the registration laws became stricter, there was always a very good chance that he might have escaped registering.
