Reminder: You can now disenchant The Caverns Below for the full 1600 dust. There is no reason not to do this. If the card is too weak, you can now craft something else. If you find you still want to play it, you can always craft it again at no cost.
Ahune's Frost Festival
It looks like the Midsummer Fire Festival is going to come to a close and Ahune's Frost Festival will immediately begin. There are a few special promotions with this Arena themed event.
A new themed Tavern Brawl.
Will reward Knights of the Frozen Throne card packs.
During the event, everyone will start at 1-0 in their Arena runs.
Here are the specific references:
New Elemental Minions
Four collectible cards have been updated to have the Elemental tag.
In addition, the Knights of the Frozen Throne expansion is now available for pre-purchase in the in-game store.
New Card Backs In Game