Details regarding entry to the Curse of Naxxramas, a new Hearthstone single-player event, have been released. Naxxramas will open its gates one wing at a time, with a new wing opening each week. There will be five wings in total.
Players who participate during the launch event will gain free access to the first wing: the Arachnid Quarter. The launch event will last roughly a month. After the Arachnid Quarter, the next four wings can be purchased for 700 gold per wing or $6.99 USD per wing. Gold can be earned in-game by completing quests or arena challenges. Bundle packages will also be available.
Once all of the bosses within any given wing are defeated for the first time, the Heroic mode of that wing will be unlocked. Heroic mode bosses are significantly more difficult than their normal versions. Defeating all of the bosses in Naxxramas on Heroic mode will unlock a new card back.