Hearthstone: Heroes of WarCraft's next expansion Goblins vs Gnomes is set to come out on Monday December 8, which you can read about here. You can currently use the new cards from the expansion in the Arena mode of the game. When you log in to Hearthstone from December 4 - 8 you will receive a free ticket for Arena mode. Its a great way to see some of the new cards in action. Are you excited for the expansion ? Are you a fan of Arena mode ?