Breath Mint is the cleanest version of Open Prediction that not only amazes laymen but also fools magicians.
Zee has done it in conventions to very few people because Breath Mint is like a treasure to him.
After guarding it as his pet effect for the last 5 years, he is finally releasing this to the public.
All you need is a borrowed deck. There is no set-up nor gimmicks involved. For mentalists out there, yes, he does not even touch the participant who is dealing the cards.