An example of gameplay in Hearthstone. Players use cards from their hands, such as minions and spells, to interact with the game board Hearthstone's collection interface displaying cards for the Mage class Set within the Warcraft universe, Hearthstone is a digital-only, turn-based collectible card game which pits two opponents against each other. There are nine classes: All classes have unique cards and abilities, known as hero powers, which help define class archetypes. (wikipedia.org).