BlackRock Mountain,Story and Hearthstone Adventure

Hello,Adventure lovers,and Blizzard Fans,we all are here Blizzard fans.Fortunately,at the PAX Convention this year,they presented a new Hearthstone Adventure among others.It is very awesome,and goes to the core stories of Warcraft.Blackrock mountain,belongs to the dwarfs,but there  are many hidden creature there,like Orcs,Dragons,Fire Elementals,it is the refugee of the sons of Blackhand,wich they are  Rend and Maim.Also,Nefarian,laid his nest there,son of Deathwing,it's so fascinating.Anyway here is the trailer,and check their official site for more informations.
https://www.youtube.com/watch?v=uWo8UlFszi0