I do not believe you are going to get an answer regarding black magic, although to stretch a little, Master Lin does talk about Feng Shui and negative energy in the evironment.
He talks about practicing Feng Shui and changing your environment to bring it into harmony with your energy system or you can practice SFQ and develope a high energy level so that the environment does not bother you and you actually affect it.
The type of energy you develope from SFQ practice tends to dissolve the negative things in the environment to bring balance and harmony.
As you yourself develope as a SFQ Healer you have many tools to remove such negative energy from people.
Hope that helps
Jeff
