Entropy A.C.A.A.N. by Brad Ballew

Entropy A.C.A.A.N. is an easy to perform miracle that is completely hands off. A blue and red deck are placed in front of the spectator and never again touched by the performer until the routine is over.

The performer reveals that the blue deck has had its entropy reversed and is travelling through time backwards. He is going to demonstrate how this time bending deck works but first the spectator needs to choose a random card and number between 1 and 52.

The spectator cuts, shuffles, and then selects four cards at random from the red deck. They choose one of the four cards as their selection and then add the values of all four cards to arrive at a random number between 1 and 52.

The performer explains that later after the show, he will place their chosen card at their chosen number in the blue deck and that change will travel backwards in time to this very moment. The spectator immediately counts down their chosen number in the blue deck to reveal their chosen card.

Easy to do
No math, deck memorization, or difficult sleights
Completely hands off
Works 100% of the time.