So, I have a great idea for a magic trick, but I'm afraid it isn't possible. The trick is this: two magicians are performing at the same time, each with a different colored deck of cards but during the performance, they "mistakenly" find the other performer's card. (I'm sorry if that doesn't make sense) Obviously, the best option is to have a duplicate, but I'm stubborn and want the cards to be signed . Any thoughts?