When it comes to Rummy Jack, wild cards are revolutionary because they give players the ability to make melds that might not be possible otherwise. While jokers are frequently used as wild cardsslots winners in Rummy Jack variations, certain games may use house rules to declare certain cards as wild. You can greatly improve your gameplay by knowing how to use wild cards. When holding a wild card, think about how it can best support your plan. If you have a wild card and two run cards, for instance, you can use the wild card to finish that run and possibly meld faster than your opponents.