Color Fusion - Eric James
The Effect :
After a quick shuffle of your blue deck of cards, you turn the deck face up and spread through the cards allowing the spec to choose a card from the face up spread. You tell them to check out the card and make sure it is totally normal.
You then have them fold up the card into quarters and sign their name ALL over the face of the card. No denying this is THEIR card. Then you take their card, set the deck aside and tear out a corner of the card for them to keep as a receipt of their card with their signature.