"In Broodcall, the peoples of Valdac have fallen victim to a dreadful plague that changes the inhabitants into monstrosities, and the arrival of dragons threatens to plunge the entire world into a never-ending abyss of fire and ash."
It was possible to take sneak peek at the contents of the expansion during the Gen Con Indy 2009. As for 25 of august, 2013 it's possible to buy most of the runes for gold at players rewards.
A new campaign, Broodcall, was added to Single Player.
Pox Nora received an update to the marketplace and the search tools. However, despite the claimings on the press release, the option to auto-bid was not added.
Premium membership were changed to allow the player to 'rental' all the warbanners from all eight factions, rather than receiving only one once. However, this does not implied the player would retain the warbanner, so once the subscription ran out, the player would lose access to all the warbanners.
The 'Midterm release' concept is introduced to the game. The legendary releases, the 'Heralds' were intended to interact with the exotic champions, the dragons, in order to made them more desirable and improve the sales.
As noted before, the 'midterm release' concept is introduced to the game. These champions will count as part of the expansion release, but were not launched the same day than the rest, neither became available through regular packs until later.