Blizzard's PAX East announcement is Hearthstone: Heroes of Warcraft, a cross-platform digital collectible card game for PC, Mac, and iPad set in the Warcraft universe. The game is free-to-play, with booster packs of five cards available. Blizzard has a price of around $1 in mind for the packs; Hearthstone will have 300 cards in the initial collection. Hearthstone is scheduled to release this year, first on PC and Mac, with iPad shortly after. The beta is out this summer and can be signed-up for now. The game is playable on PAX East's show floor.

Each player's deck is based around a central hero from one of nine Warcraft classes. Players can take on computer opponents or Battle.net friends and other online players. At today's PAX East panel, Blizzard showed how Hearthstone includes twists on familiar mechanics from its Warcraft games, including disenchanting duplicate cards to turn them into arcane dust for use in card crafting.

This article was originally published on Joystiq.