The trick of scenic spots is a kind of witchcraft, which is created by people who hate themselves to vent their dissatisfaction. I don't know exactly what it is, but I heard that centipede and scorpion are used as raw materials. You can cultivate these poisons from an early age, extract their juices to a certain extent, or grind them into powder. When you hide this powder under your nails, when you see someone trying to master the method, you will use your nails to bounce this powder on that person. Of course, there are also methods to let others swallow poison directly and then manipulate it, so that the person who accepts the method is controlled by the teacher. This is a very evil witchcraft, which is rare now.