The first wing of the Blackrock Mountain adventure, Blackrock Depths, is out today with each week being the release of a brand new wing. Each wing will cost 700 gold or $6.99 (5.99 EUR / 4.99 GBP) each, however there are some bundles available if you want to buy them in bulk.

Bosses: The new bosses are Grim Guzzler, Dark Iron Arena, and Emperor Thaurissan. You can see a full list of the normal and heroic Blackrock Mountain bosses and hero powers here. Be sure to check out the uncollectible cards of Blackrock Mountain to see what kind of cards these bosses will be playing against you.

Deck Guides: You can filter for decks designed to defeat particular Blackrock Mountain bosses! We'll be writing up an overview of the boss encounters later today. If you're writing a deck guide, be sure to tag your deck as being suitable to defeat a particular Normal or Heroic boss under the adventure section.

Rewards: This week, you will unlock the following cards for beating the entire wing on normal mode: Grim Patron, Gang Up, Resurrect and Emperor Thaurissan. In addition, you will unlock the Hunter and Mage class challenges which upon completion unlock Quick Shot for the Hunter class and Dragon's Breath for the Mage class.

Originally posted by Blizzard (View Original)Collapse

Adventurers! There are some … minor annoyances I may ask you to attend to within my precious Blackrock Mountain. Take heed – a certain elemental lord is acting hot-headed.
Ah, if I may correct, you, Ragnar-
You’ve been a smoldering thorn in my side for long enough, you overstuffed candle! Your time has come!

The first wing of Blackrock Mountain™: A Hearthstone™ Adventure has opened! We know you’d “lava” to test your decks against the powerful elementals and nefarious dragons that lurk within this massive mountain - and now’s your chance!
For more information on what lies within the heart of Blackrock Depths, click here.
Access to wings may be purchased using in-game gold or real world currency. Wings can be purchased individually for 700 gold or $6.99 USD. Players can earn the in-game gold needed to unlock the next wing by completing various quests or emerging victorious from the Arena—or they can choose to unlock the next available Blackrock Mountain wing using real money.
Blackrock Mountain bundle packages are also available! With bundle packages, you can unlock any remaining wings you may have at a discounted real-money price. While purchasing Blackrock Mountain wings in bundles doesn't give you early access, it does prepare you to dive into the next challenges as soon as they unlock! Check out the bundle prices in the image below.