The Val Evans' Stop Trick of Tomorrow is a classic card-control effect that has fascinated audiences for decades.

Here's how it works:

Display a standard deck of Poker sized playing cards, a length of ribbon, and a simple wooden Houlette.
Two audience members select cards and return them to the deck.
Place a ribbon over the top of the Houlette, followed by the deck of cards, pushing the ribbon downward.
The face or bottom of the deck is visible through the hole in the back of the Houlette.
Lift the top card to confirm it's not one of the selected cards.
Lift the next card, which also proves to be an indifferent card.
Turn the Houlette so the back of the cards faces the audience.
Remove cards one by one, placing each behind a clip at the front of the Houlette.
At any point, the spectator can call "STOP."
The cards are removed from the clip and shown to be all different.
Pull the ribbon, and the entire deck rises out of the Houlette.
The spectator can remove the very next card, which turns out to be one of the selected cards!

This effect has been considered a classic in card magic made in select hardwood, ribbon and the full instruction booklet. You provide the regular deck of Poker sized cards.

If you're a fan of elegant card tricks, the Stop Trick of Tomorrow is definitely worth exploring!

Val Evans' Stop Trick of Tomorrow by Lee Jacobs