Imagine having a card selected and signed by your spectator. The card is replaced back into the deck. Now instantly and visually the deck changes colour. Leaving just one odd backed card in the pack (your spectators card)
Show four normal cards, after a magic gesture,four cards turn to special cards with rose on it one by one.
After another gesture, the deck of the cards face up, with a rose on it.
At the end,appear a real rose on the deck of the cards.