Joker Wild is played with a 53-card deck, the regular 52-card deck plus a joker. Joker Wild follows conventional poker rules concerning how hands are formed, with one exception: A joker is a “wild” card, which means that it is counted as the most favourable card when used to complete a winning hand. For example the joker can be used to complete a straight or a flush, to improve a three of a kind to a four of a kind etc.