In time with this expansion, the Android version of Hearthstone for tablets will also finally be released.
the newly announced Goblins vs Gnomes, this expansion will bring over 120 new cards to the game, all of which will be themed around engineering. For example you can expect cards such as Robotic Sheep, Exploding Sheep (a 1/1 card with a death rattle that deals 2 damage to all minions), and Annoy-o-Trons. Now we get to see a bit of a preview as to what some of the new cards will look like and what their effects will be.
Goblins vs Gnomes is going to turn Hearthstone on its head. It introduces a ton of new cards with all-new options for decks and strategies, and we can’t wait to see all the crazy combinations players come up with. - Mike Morhaime, CEO and co-founder of Blizzard Entertainment
This new expansion will be arriving at some point next month (December 2014) which is also the month that the Android tablet version of Hearthstone will finally be making its appearance. However we can check out some of the cards and art now thanks to a couple of videos Blizzard put out and some key art as well. The first video (above) is more of an intro trailer about Goblins vs Gnomes while the second video (below) is more of a gameplay preview for the expansion.