I didnt ASSUME, I am 1000000000000% sure that black magic was done to me and my oldest brother. I dont need to go into detail about what happened but it was for sure black magic. The WORST two months of my life happened during the time in which I was friends with a girl whose mother knew how to do it. During that time she put talismans in my house which held fragments of paper with arabic writing as well as bones, needles and other things. Before the talismans both my brother and i were very happy with our lives, we had so much going for us. After the talismans started showing up in my house, terrible things began happening to us both. After the first 4 things, we knew it wasnt coincidence. We are lucky that my mother and I ALWAYS clean and very thoroughly clean so we found the talisman and put them in a box and brought them to the right people.
I went to two highly esteemed imams in my state and they confirmed my fears judging by what was in the talismans and the sequence of events.
So YOU can believe in science all you want and believe that black magic doesnt exist. Doesnt matter to me. Myself, i believe that it is out there and that people should make dua and protect themselves from it.