If data-miners parsing the next Hearthstone patch are to be believed, the next expansion to the digital collectible card game will be themed around Blackrock Mountain.
Data-miners exploring the next patch for Hearthstone claim to have found information regarding to three new card backs: Ragnaros, Molten Core and Golden Celebration.
The requirement for the Molten Core card back is "purchase brm presale", claim the miners. In the World of Warcraft community, "BRM" is shorthand for Blackrock Mountain. The Ragnaros card back is awarded through ranked play.
Blizzard's Hearthstone team will be hosting a panel at PAX East later this week. Hearthstone's first expansion, The Curse of Naxxramas, was revealed at PAX East this time last year.