You pay double credits and a small percentage of the time the Dream card feature will activate. The hand will deal you four cards, and if the Dream card gets activated, the 5th card will automatically become a card that will give you the best possible hand.
In this case, I got dealt 4 to the Royal and luckily, the dream card feature activated, giving me the 5th card I needed for the Royal. It’s an expensive game, remember you are paying double credits for the dream card which will only activate a certain percentage of the time — each video poker variant differs in how often the feature gets triggered. It’s highest in deuces wild.