A red -backed deck of cards is taken out and shown on both sides fairly. You ask the spectator to name a card. Lets say they name the 7 of spades. You very openly and fairly take out the 7 of sapdes and place it into their hand. You ask them if they noticed anything different about the cards. No? You
then tell them that before you left the house you placed a blue -backed card in with the red -backed cards..they turn over the 7 and its the ONLY blue -backed card! (Hit 1) . Not wanting your deck to be out of sync with the world around you， you visually cause every single card to CHANGE to match the blue -backed card. (Hit 2) Then as an unexpected turn you place the now blue -backed cards into the case and you VISUALLY CHANGE THE ENTIRE CASE TO A BLUE CASE! (Hit 3) Which can be show front and back and handed out…if you wish!