Kobolds and Catacombs is right around the corner, and Blizzard has been ramping up the card reveals as we reach the end of November. In their latest blogpost, more details about the launch of K&C have been revealed. 

On December 7th, the expansion will go live, and players who log in during the release period will recieve three K&C packs and one random Legendary Weapon card for free! In addition, three sequential one-time Dungeon Run quests (in the style of Gadgetzan's quests) will also appear, awarding an additional pack each. Make sure you’ve unlocked daily quests by completing The Duelist quest before the expansion drops, if you're a new player. It’s also wise to make sure that there’s room in your quest log on release day so none of your quests are replaced!