Hearthstone has officially launched. It came with a cool “special offer”. Win 3 games in Play Mode in Hearthstone, and the Hearthsteed is yours! You can get it for free.
Obviously, this is Blizzard’s way of trying to get WoW players interested in trying out Heartstone. I’d been playing the Hearthstone beta, and liked it enough to want to keep playing. So, for me, it was a “no brainer” to go get this mount. I get a reward for doing something I was going to do anyway!