Gaining an advantage over rivals can be achieved by knowing how to use wild cards efficiently. For instance, you don't need the third card of slots rummy 777that rank to form a set if you have two cards of the same rank and a wild card. It is imperative to use wild cards sparingly, though. Although they can aid in meld completion, if they keep you from moving forward with declaring "Kash," keeping them around for too long may be harmful.