Blizzard has announced that Hearthstone will get a single player Adventure Mode called Curse of Naxxramas: A Hearthstone Adventure.

The content is expected to begin rolling out soon with new content being rolled out for it over the course of about five weeks. Similar to the game's Arena Mode, you will be able to buy into Naxxramas sections using in-game currency or real-world money. The first area, The Arachnid Quarter, will be free to everyone.

You can find out more and check out some of the new cards at Battle.net.