The wave card eats your cards until you find a match.... as an added note, If you click on the menu icon on the top left, and on the bottom right of that pop-up you'll see a book labled guide. Click it. It will display a pop-up that shows what all the different cards and stuff mean just use the left and right arrows to go through the pages and scroll up and down each page to educate yourself on all the different types of specialty cards there are along with the purpose of each of the different types of boosts