Kings' Royale by Wild-Colombini Magic - DVD

A spectator selects four cards from a red-backed deck and they are inserted in the middle of the blue-backed deck.

You remove four cards from a blue deck, show them to be indifferent and insert them into the red deck.

The spectator's four red-backed cards are turned over, and they are all Kings.

Your four blue-backed cards are turned over to show they have changed into the four Kings!