To prove black magic exists. One can carry out a very simple test.
Take a volunteer. You can find many who will challange including me. Go to some alim, any of your choice, and not just 1, 10, take on 50. Tell those baba's to inflic what ever black magic, jadoo they want to inflict.
Note the persons behaviour before and after. Note his life patterns. Note his life in general before and after. And then judge it your self.
There is no need for any scientific aparatus, equipment or anything of any sort.