ou might have heard of the "buy-a-box" card that we mention each time there's a new set. It's a free alternate-art premium card that's given to the first twenty people to buy a Booster Box at participating locations. And if you hadn't, you have now! The Buy-a-Box card for the Magic 2012 Core Set is Chandra's Phoenix, and it looks like this!
Promotion mechanic might vary by region.