Hearthstone's single-player content won't cost you a dime
Hearthstone: Heroes of Warcraft's single-player campaign kicks off soon, and if you're willing to put in the work to earn in-game gold, you won't have pay for it.
Hearthstone's single-player content is called Curse of Naxxramas, and is set in a floating necropolis composed of five wings (as in the architectural unit, we assume).
According to a Battle.net post, players will be offered free access to the first wing - the Arachnid Quarter - during a launch event lasting "roughly a month or so". That's kicking off this month.
In the Arachnid Quarter, players will face the bosses Anub’Rekhan, Grand Widow Faerlina and Maexxna, earning new cards along the way.
The four remaining wings are called the Plague Quarter, Military Quarter, Construct Quarter and Frostwyrm Lair. Each will become available at a rate of one per week, but you'll have to buy your way in with in-game currency; each wing will set you back 700 gold.
Gold can be earned by completing quests or winning Arena matches, but if you choose to shortcut this process you can purchase access to the four remaining wings using real money. Individually, wing access will cost you €6/£5 but bundles are available and it's cheaper to buy them in bulk. Wings you have unlocked using in-game currency count as "owned" when working out what bundles you're eligible for, by the way.
Regardless of how you secure access to a new wing, you'll have to wait for its release day with everyone else. In the meantime, though, you can revisit a successfully completed wing in Heroic Mode, facing even more difficult bosses with the possibility of earning a rare card.