Someone Casts Black Magic on You
A circle drawn on a floor. A name spoken in a voice that is not quite familiar. The feeling that someone else is directing events. Black magic in a dream belongs to that feeling: it pictures fear and influence, and it makes no claim that magic is real. It says nothing about anyone's religion either.

What It Means When You Dream of Black Magic
Black magic usually stands for fear, for influence, and for the power a person hands over. A scene of it may show a situation where you feel controlled, a suspicion you cannot verify, or a fear of your own wish to have power over others. The dream is symbolic, and it is not evidence that a real curse has been placed.
How much say you feel you have tends to set the mood of the scene. A ritual often carries a structured fear. A figure you know may stand for an influence you already recognize, and a stranger for a vague anxiety nobody has named yet. Who seems to be directing your life is the part that matters.
How the Meaning Changes
Who is doing it, and what the ritual looks like, both change the reading.
A ritual
A ritual often stands for a structured way of handling fear. A habit, a superstition, a story repeated until it feels solid: any of those gives the fear a shape.
A known figure
A known figure often points to a real influence within your life, or a part of yourself that has been given too much power. The scene may concern that relationship, not magic.
An unknown force
An unknown force can picture anxiety that has not been named yet. Uncertainty often sits there, or a rumor, or a feeling that something is working against you. None of that is proof of harm.
Making Sense of It for Yourself
Look at who seemed to hold the power and how you responded. Then ask where influence is felt in waking life, and what boundary would return a sense of agency. One useful step is to name one situation where you feel controlled, and to work out a response that neither retaliates nor gives the fear more power.
Fear can also be a sign that authority has gone to a story, a rumor or a person. Which of those holds yours, and what would take it back, is worth sitting with.
FAQ
What does it mean when you dream about black magic?
Black magic in a dream is usually read as a fear of influence and the sense that someone else holds the power. Nothing in the scene asks you to believe a curse is real.
Is a black magic dream a warning?
A black magic dream is not a prediction of harm. It can picture anxiety about influence, and it stays symbolic.
What does a ritual mean in a dream about black magic?
A ritual can give fear a shape and a sequence to follow. A habit or a superstition may do the same work.
What does a known person mean in a black magic dream?
A familiar face in the ritual usually stands for the authority you have handed that person. Ask which of their opinions you have stopped questioning, and whether it still deserves that place.
Why do I dream about black magic?
A dream can use black magic to picture a fear of being controlled. What sits underneath is agency and influence, with no claim about the supernatural and no judgment about anyone's beliefs.