The Curse of Naxxramas, the first singleplayer adventure for Hearthstone, will be released next week.
Starting July 23, all Hearthstone players will be able to access the first wing of the five-part adventure, the Arachnid Quarter. The first hit is free; subsequent wings will need to be purchased with in-game gold or real currency.
The full expansion adds 30 new cards to the game that are earned by defeating bosses, with completion of each wing guaranteeing the player a new Legendary class card.
Curse of Naxxramas has its own unique game board, as well as nine class challenges that require players to duel using a predetermined deck.
As each is released, the cards available therein will show up in Arena mode, even if they haven't yet been earned.
For more details on how to access the Arachnid Quarter and the subsequent wings of Naxxramas, click here.