Karl Hein has developed an Out of This World exactly tailored to the needs of a working performer. In effect, the spectator is able to perfectly separate a shuffled pack by color. Karl's effect ticks all the boxes a professional wants:
It's fast: most Out of This World effects last far too long. This one gets straight to the point.
The best switch: The switch Karl uses for the packets is imperceptible, and logical. Most routines have a "weird" moment near the end.
The spectator shuffles: this is key. You want to make sure the spectators, themselves, have mixed the cards.