Black magic is very much like a virus that seeps into the subconscious parts of your mind and grows to infect your entire soul. You can fight black magic through self-empowerment, awareness and healing.
Black magicians are everywhere. They want to inflict harm on you intentionally and unintentionally. They are in your churches, your schools, at your work place. Many of these people don't even know that they are performing black magic, because they are not aware of their thoughts and bad intentions. All magic starts and ends with intention!