Triple D is an amazing trick worked with only 3 cards in the deck.
Imagine, with a shuffle deck of card, you let the spectator pick 3 random cards (No Force).
Now they think of 1 card in 3, and shuffle all the 3 cards
–> Boom, with your feeling you found what card they picked
+ No gimmick
+ No force
+ Borrwed shuffled deck