The guesser and the giver work together in this game. To play "Black Magic" you have one person, the "guesser", close their eyes or face away from the group. Then, another person, the "giver", silently points an object out to everyone else in the room. This object is now an "it" that the guesser has to guess.
Have the guesser turn around. The giver points to many objects in the room asking if the object is "it." The secret is, none of the objects are "it" until after the giver points to something black (a person's shirt, watch, phone, anything black). The object immediately after is the "it" in question.
Giver: "Is it this Cheerios box?"
Giver: "Is it my (black) boots?"
Giver: "Is it this soda can?"
This should drive everyone in the room crazy trying to crack the code!
Click this animated image!