PAX East is currently in full force, and everyone was well aware that Blizzard was heading to the conference to unleash their new project. Enter Hearthstone: Heroes of Warcraft, a new free-to-play online collectible card game.

Based on the vast lore of the Warcraft universe, players will use collectible cards to battle each other in one-on-one matches, using their winnings (or real cash) to earn or buy new packs of cards to further increase the effectiveness of their decks. Currently, Blizzard is promising over 300 cards, with each “booster pack” giving the player 5 random cards. Similar to other collectible card games, these cards will be rated as common, uncommon, rare, or legendary.

Gameplay is very similar to other card games, but with a significant connection to World of Warcraft. Building decks and attacking your opponent is based on health, mana, and summoning creatures to do your bidding. Think of it as a turn-based RPG with trading cards. Blizzard has also put a lot of time and effort into the game’s presentation, which features an impressive 3D environment and tons of monster and attack animations.

Hearthstone: Heroes of Warcraft will enter beta testing sometime this summer, with a full launch later this year.