Hearthstone's Curse of Naxxramas solo adventure will begin its rollout on Tuesday, July 22nd.
Initially, Naxxramas will only feature one wing, the Arachnid Quarter, but will open one of the remaining four wings each week thereafter. While the first wing is free, subsequent wings will cost to purchase, either with money or with in-game gold.
Curse of Naxxramas will be launched across all of Hearthstone's platforms: Windows, Mac, and iPad. By beating each of the wings, players can earn new cards to use in competitive matches.