You only have until July 6 to claim your free Whispers of The Old Gods packs.
When Whispers of The Old Gods launched for Hearthstone earlier this year, it came with quite an attractive launch promotion. Players could earn up to 13 free packs of cards, just by playing the game. Sadly, all promotions have to come to an end, and Blizzard has announced that this one will be ending on July 6.
For a quick refresher on how to get these packs: the first three are awarded simply for logging into the game. You can then get five more packs for completing a "win two games in the new Standard mode" quest, after which a "win seven games in the new Standard mode" quest will appear, awarding an additional five packs.
However, players will still get a free C'Thun and two Beckoner of Evil cards in the first Whispers of The Old Gods pack that they open, even after July 6.