More challenges, Achievements, unlockable cards and decks have come to Duels of the Planeswalkers courtesy of an expansion pack. The update -- which apparently doesn't have a name but released this afternoon -- ushers in a new slice of single-player campaign, too that is said to feature more battles against bad dudes in order to unlock Rhys the Redeemed's and Chandra Nalaar's respective decks.
To get a bit more specific about the expansion's details: three totally new decks are being added on top of three new unlockable cards for the game's now-eleven decks. Five more puzzle challenges and host migration functionality round the 400 MSP package, which apparently also dishes out Avatar awards (as seen above).
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