Tonight at an event at Chinajoy, Blizzard took the wraps off its next Hearthstone adventure, One Night in Karazhan. 

The adventure will consist of 45 cards across four wings and 13 bosses, along with a free prologue mission. Wings will be released once per week, starting in two weeks. As usual, buying the entire adventure within the first week will grant you a special cardback.

The story follows a magical party thrown by a young Medivh. He's enchanted everything in his tower to liven up the party, but then went missing. You show up early and set out to find him and save the party while avoiding the magical items littered around the area. The prologue mission has you playing as Medivh himself, and will grant you the Enchanted Raven (Druid) and Firelands Portal (Mage) cards.

As a result, the stages shown so far all have some kind of unique interplay with the board:

• The Parlor: An enchanted chess match with pawns to be positioned on the board
• The Opera: A play recounting famous storybook tales
• The Managerie: A haywire Curator releasing all manner of beasts
• The Spire: A dragon with beams that require careful positioning

Take a look at all of the cards revealed so far: