If you haven’t already seen the Goblin and Gnome invasion into Hearthstone you need to check in to the arena to get your free pass (the offer expires tomorrow so get going!). The new cards are currently playable in the arena and are due for full release tomorrow, where the cards will be purchasable in the shop for regular play outside the arena.
As you would expect with any update, there’s a whole host of bug fixes, card tweaks and changes. You can get the full run down in the official patch notes here. For a little insight into the arena invasion go here.
Expert packs have been renamed to classic and are still available, a new unit type “mech” has been added, so get looking for synergy with other mech type cards. A new themed board has been added too. Enjoy the official trailer below.