The magician shows his audience a vibrantly colored feather, and attempts to balance it on the back of a playing card. He succeeds!
But then, the real magic happens: the feather seemingly controlled by the spirits, rises to a vertical position on the back of the card, and begins to twist, twirl and dance! It moves back and forth and around in a circle at the command of the spirits!
The spectator then removes the feather from the card. They can examine it, and the card can be freely shown.
No threads, no magnets and no complicated gimmicks to worry about. Works every time, and works like a charm. Guaranteed to catch the eyes of every spectator in the room. Imported from Europe.