Just a friendly reminder in case you forgot: you can now pre-purchase the Blackrock Mountain expansion for Hearthstone.
Those who do will gain immediate access to the Molten Core card back which is only available by pre-purchasing the Blackrock Mountain adventure with out-of-game currency. This included actual money or via an iTunes or Google Play balance.
When you pre-purchase, you are also granted access to each wing of Blackrock Mountain becomes as soon as it is available in your region.
The adventure pack will run you $24.99 through the Hearthstone in-game shop.
Blackrock Mountain will release in April.