Hearthstone: Heroes of Warcraft is also coming to iOS and Android. And once all versions are finalized and released, they'll be able to interact with one another.
Lead designer Eric Dodds confirmed that the PC version of Hearthstone will release first, with iOS and Android versions coming later. However, since Hearthstone decks are tied to a player's Battle.net account, cards can be accessed across all platforms. Not only that, but card battles can also be conducted cross-platform.
"You could start in the morning playing on your PC and then, in the afternoon, pick up your iPad and you'll have all of your decks there," Dodds added. "When you're choosing to play, I might be playing against some other iPad person or I might be playing against the PC version."
Hearthstone's mobile version is expected to release in the second half of 2014.