Hearthstone: Blackrock Mountain (2015)

Blackrock Mountain is Hearthstone's second adventure. Home to Ragnaros the Firelord and his fire elementals, Nefarian and the black dragonflight, and an army of Dark Iron dwarves, the adventure features 5 wings, with 17 boss encounters in total, and provides 31 new collectible cards for players to add to their collections, as well as a new card backs and a new battlefield. The adventure features a Heroic mode and 9 Class Challenges.