A self-contained way to very cleanly predict any card your spectator deals to.
The effect is this:
A circle is drawn on the cellophane of a card box. The circle is shown to your spectator. In this circle, you draw one card; this card will be your prediction. The cards are dealt face up one at a time. Your spectator is asked to stop on any card they like. The card box is flipped over and drawn in the middle of the circle is the exact card they stopped on. The reset is basically instant and the method is really clever. It can be repeated with four different outcomes and the online instructions from Mark Mason are very thorough and easy to follow.