The second wing of the Blackrock Mountain has been released, the main focus of this wing is on fire Elementals as they are all lieutenants and minions of Ragnaros the Firelord.
There are 3 major bosses you will encounter on this wing, Garr, Baron Geddon and Majordomo Executus.
After you have defeated all three of these major bosses, you will be rewarded the Legendary Majordomo Executus card.
If the challenge wasn’t enough, there are also two additional class challenges avaliable for Warriors and Shaman. Just like the previous Hearthstone Adventure, there will be a Heroic Mode after you have defeated the normal mode where the difficulty is amplified.