Ink On the Deck by Juan Pablo
Ink On the Deck: imagine that a participant freely chooses two cards from a deck, (for example the ace of hearts and the Six of Clubs). Now, the magician takes on his fingers some "invisible" ink from a marker and when passing his fingers over the edge of the deck of cards, the name of one of the chosen cards magically appears written, the Ace of Hearts!
Now, the magician riffles the deck of cards and the card that is written on the edge of the deck (the Ace of Hearts) is magically and visually transformed into the second chosen card, the Six of Clubs! Immediately, the magician can show the deck of cards as a normal deck of cards!
Ink On the Deck is very easy to do and is useful for magicians who perform close up performances because it is a super original, visual magic effect and it resets in five seconds.