-Black magic is as real as your life. If you have not been victimized keep praying that you never come across such negative, powerful and deadly energies.
-If someone you know has become a victim of black magic/spirit world/paranormal and is seeking help, please do not brush him off or side track him by saying that black magic does not exist, it's all in your mind, it will only harm you if you believe in it and so on. Whether someone believes in it or not it can seriously harm the victim and even kill in the long run.
-Reversing is one of the ways to stop it, but what if your enemy is a master of black magic and has the spirit world access, he or she can hit you back with severely.
-My advise would be to isolate yourself from everyone, stop taking alcohol, drop all meat from your diet, drop smoking or taking drugs and turn to spirituality. Pray and meditate every few hours asking for divine help. Basic black magic done on you where the spell caster/black magician does not have access to your nails, hair or a piece of worn clothing like underwear can be taken care of with spiritual practices.
-Start looking for a professional healer or a spiritual person who has access to the spirit world and can look into your life, guide you and can help you.
-For serious cases of black magic where you were fed "ash of the dead" creating a hole in your aura where you are possessed, experiencing paranormal activity like seeing shadows, ghostly figures, disturbed sleep, waking up in fear, healing cracking sounds from the walls, doors opening and closing, getting jerks on your body parts and other weird stuff, you will be better off seeking spiritual help.