This free giveaway is part of the celebration of the expansion’s launch, but it won’t be 100% free because players will need to earn them. According to a post on Reddit, it was noted during Blizzard’s Whispers of the Old Gods live stream that the first 3 packs will be given away for players who login during the release event.
These free packs will contain a guaranteed C’Thun legendary card, so players might want to login for that. An additional 5 free packs will be given away to players who win two game in Hearthstone’s new “Standard” format, and the remaining 5 free packs will be given to players who win 7 additional games also in the Standard format.
Basically if you play enough you should be able to walk away with 13 free packs relatively effortlessly. This should save gamers about $15 in real-world money, or 1,300 in-game gold so if you’re looking to get your hands on more cards, this sounds like a way to go about it. In the meantime gamers who pre-order the game will be able to get 50 packs for $50 which is a pretty good deal.