The Album is a section in which you will be able to see all your card series. To enter the Album, tap on 'Get more cards' on the board of the game’s main screen and then tap on 'Album'.
There you will see the information for every card (prizes, rarities and description), add carts to your board and share them in your social media.
Cards come in series of six unities. Once you get the first 5 cards of each collection, you will unlock the Prize Card. This is the rarest card from the collection and the one with the best prizes.