Canasta gains an interesting strategic dimension with the addition of wild cards. Although there are rules governing their use, players can use wild cards to finish melds or make new ones. A vaf1 refused slotslid meld, for example, requires at least four natural (non-wild) cards in addition to any wild cards. This requirement pushes players to consider both their opponents' possible moves and how they use their wild cards. Because of its distinctive fusion of strategy, cooperation, and luck, Canasta is a popular option for card players looking for a novel twist on classic Rummy gameplay.