As a bonus to returning Magic: The Gathering players, a free deck key will be granted in Duels of the Planeswalkers 2013. I discovered this when first booting up my review copy from Microsoft, discovering a message of thanks for my continuing patronage.
You can use the key to unlock a full deck right away, including all of its 30 unlockable cards, or you can turn all of your cards in one particular deck into foils.
In Duels 2013, players can compete with friends or the AI as they travel across fantastic planes, take on mini-bosses, attempt to solve puzzling challenges, and team up with others in the updated Planechase multiplayer format. The digital game will also be the first place to check out new cards from the Magic: The Gathering 2013 Core Set launching later this summer.