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Liner - created by Bond Lee & Alexander Stefanus, produced by MS Magic.

Here's how it works: A spectator picks a card freely, signs their name on it, and puts it back into a random place in the middle of the deck. The magician draws a black line on the top card; suddenly, the black line moves instantly, jumps to different positions, and then disappears in a flash.

When the magician spreads out the entire deck, it is revealed that a black line has appeared on the back of one card-and that card is exactly the one the spectator signed at the beginning.

This magic trick features a complete and powerful routine, with highly visual effects and very simple operations, making it suitable for all close-up magicians.