Has anyone ever experienced some sort of black magic? To them or to their family?

Story - So recently my friend to me a case about black magic and it was fucking scary. I'm an atheist by the way, don't even belive in ghosts and shit, horror movie never scared me, but this, this gave me the chills. So I was left thinking of black magic is real. And by the, he is Christian. So anyone ever experienced or heard from your close friends or relatives about black magic? Ps- I didn't know what tag to choose so I just put culture.