Kolossal Killer is an incredible effect. It is so simple yet so effective, You ask a spectator to
think of any card they want (no force). You pull out your wallet and reach inside and pull out the
exact card they are thinking of.
Because of how it works, you might get the card wrong but
there is a built in fail-safe in which even if you get the card wrong, you are still right! Once you
get the trick you will know what I mean.
The only downside if that if your wallet is
already filled with debit/credit cards, IDs, gift cards, etc, then it kinda stinks to have to add
more cards, but if you don't mind having some extras then this is an amazing trick. I used this one
a lot when I first started out and it's always gotten me great reactions.