Players must, however, be aware of both the cards they need to finish their runs and the cards that other players have discarded. In Rummy 777, players can outwit their rivus refusal slotsals and improve their chances of winning by making good use of the power of sets and runs. In Rummy 777, a player's hand can be significantly improved by using Jokers, which are strong wildcard cards. The joker is a card that can be used to replace any other card in a set or run when dealt to each player at the start of this variant of rummy.