Blizzard announced its upcoming Hearthstone: Heroes of Warcraft single-player Adventure Mode at PAX East today, detailing the challenges players will face as they progress through the new Curse of Naxxramas campaign.

Curse of Naxxramas features a series of unique enemy encounters and boss battles that take place on a new Adventure Mode-exclusive game board with interactive corners. The mode adds 30 new cards to the Hearthstone deck, including bonus cards awarded for completing nine unique Class Challenges.

The Curse of Naxxramas will gradually roll out new Hearthstone content in the five weeks after its simultaneous launch for Windows, Mac and iPad this year. A release date has not been announced. [Image: Blizzard]