LS Buttons by Leo Smetsers Boyet Vargas and a black ribbon marker

and a black ribbon marker

and the magician can give the signed card to the spectator as a souvenir

Trevor's Ace Location Routine - The four Aces are each found in the pack at a location determined by a spectator rolling invisible dice

On David Blaine's Magic Man TV Special he makes initials mysteriously appear on his arm after rubbing ashes over his arm

From Professional Opportunist Vol

LS Buttons by Leo Smetsers Boyet Vargas and a black ribbon markerLeo's Buttons take the classic coin shell set to an entirely new level. This beautifully crafted set features precision engineered buttons with a perfectly fitting shell, making it completely invisible. Now, you can perform all your favorite shell routines with ease, and for the first time, Leo Smetsers reveals his full routine and presentation for this unique set. Designed to match the size of dollar coins, these buttons are not only easy to handle