The Hearthstone Curse of Naxxramas pricing has been announced with each wing costing 700 gold or $6.99 or players can purchase bundle packs at discounted rates. As mentioned before, the first wing will be available for free during the launch event, which will last roughly a month or so. After that, players can pay $19.99 to access the four remaining wings, or if they want to break it up, bundle packs are available for the remaining three wings or even the remaining two wings. The $24.99 five-wing package only applies to those that miss out on the first free wing during the Curse of Naxxramas launch event.
The wings of Naxxramas will open in the following order: Arachnid Quarter, Plague Quarter, Military Quarter, Construct Quarter and Frostwyrm Lair. Purchasing the Curse of Naxxramas wings in bundles will not open or grant access to the wings faster than the one-wing-a-week schedule.
Along with the announcement on the Curse of Naxxramas pricing, Blizzard also revealed that a Heroic Mode will be accessible once players have defeated all the bosses within any given wing for the first time. The Heroic Mode for that particular wing will be more difficult and defeating the bosses in Heroic Mode will unlock a new card back.
Unfortunately, the company did not announce a release date for Curse of Naxxramas, but it is expected to launch within the month.