Naxxramas is a floating necropolis, home to a host of undead bosses ready to challenge worthy opponents eager to test their card-slinging mettle. To undertake the challenges that lie within each of the five wings of the Adventure, one must first gain access to their secrets. But don't worry too much about the price of entry-much to Thaddius' chagrin, it won't cost you an arm OR a leg. Naxxramas will open its gates one wing at a time, with a new wing opening each week. The wings of Naxxramas will open in the following order: Arachnid Quarter, Plague Quarter, Military Quarter, Construct Quarter, and Frostwyrm Lair. Once you've defeated all of the bosses within any given wing for the first time, you'll unlock the Heroic mode of that wing. Heroic mode bosses are significantly more difficult than their normal versions, and they will prove to be a challenge for even the most veteran Hearthstone players. Defeating all of the bosses in Naxxramas on Heroic mode will unlock a new card back for your collection. The undead horrors of Curse of Naxxramas: A Hearthstone Adventure are dying to meet you.