Hearthstone's first piece of co-op content will be released tomorrow. This week's Tavern Brawl will see two players joining forces to take down a boss together in an event called Unite Against Mechazod.
According to the details published on the official Hearthstone site this evening, each player will head into a battle with a pre-assembled deck. The two of you will then take it in turns to tackle Mechazod, as he moves from one table to another. If one of you falls to his mechanical mischief, you'll both lose.
In a further change to proceedings, you'll receive your free Classic card pack, even if you do lose the encounter. In previous Tavern Brawls, you would only receive a pack for winning your first match.