https://www.pcgamer.com/blizzard-is-giving-away-free-hearthstone-cards-during-blizzcon/

BlizzCon returns this weekend for a two-day par-tay celebrating all things Blizzard, and if you're a Hearthstone player that means you've got an opportunity to score some free cards.

Log into the game on November 2—BlizzCon Day 1—and you'll be given a free golden Star Aligner card, and a golden Secret Plans card. Jump in on November 3, the second and last day of this year's BlizzCon, and you'll also get a free Boomsday Project card pack. The freebies are completely separate from BlizzCon itself, so you don't need to worry about springing for a virtual ticket or anything—just log into the game at the appropriate times, and the cards are yours.