Blizzard has revealed Rastakhan's Rumble, the new expansion for Hearthstone: Heroes of the Storm, which adds 135 new cards and new mechanics to the card battler on December 4.
Rastakhan's Rumble is centered around the troll tribes of Azeroth who enjoy the blessings of Loa, which come in the form of powerful Legendary minions. Also, players can use Spirits to aid them, these new class-specific minions each can use own "impressive effect" and synergize with the Loa.
Take a look at the Rastakhan's Rumble expansion for Hearthstone in the videos below.