Unlock a bonus foil card by entering the following codes:

WMKFGC
PCNKGR
NCTFJN
HTRNPW
GDZDJC
FXGJDW
MWTMJP
FNMDGP
KWPMZW
GPCRSX

Unlock the following Avatar Awards by performing the corresponding tasks:

AVATAR AWARD - HOW TO UNLOCK
Gideon Jura T-shirt - Defeat Karn in the Single Player Campaign.
Planeswalker T-shirt - Defeat Chandra in the Single Player Campaign.
Planeswalker trucker hat - Defeat Kiora in the Single Player Campaign.

Note: A cooperative friend is required.  Start a Free For All Duel, set it to private, and invite your friend to the one on one duel. When your friend enters, begin the duel. The winner will get a card. After you or your friend wins, start over. Repeat this for a full deck.

Unlock the Gideon Jura and Kiora Atua gamerpics by defeating Gideon Jura in the single player campaign.

ACHIEVEMENT - HOW TO UNLOCK
Gather Your Allies (15 points) - Hosted an Archenemy match on Xbox LIVE with two human teammates.
Metalcraft (10 points) - Controlled three artifacts in a game.
Mythic (10 points) - Cast a Mythic rare spell in a game.
Strength of Stone (10 points) - Defeated Koth in the Single-Player Campaign.
Magic - The Puzzling (10 points) - Solved a Challenge.
You'll Never Get Away With It (20 points) - Defeated an Archenemy in a game.
Final Exam (30 points) - Defeated Karn in a campaign game.
Puzzling Master (10 points) - Solved Fifteen Challenges.
Evil's End (25 points) - Completed the Archenemy campaign.
Ancient Depths (15 points) - Defeated Kiora in the Single-Player Campaign.
Unquenchable Fire (20 points) - Defeated Chandra in the Single-Player Campaign.
Wielding Steel (25 points) - Defeated Gideon in the Single-Player Campaign.

"Expansion 1" achievements:
ACHIEVEMENT - HOW TO UNLOCK
My Crushing Masterstroke (20 points) - Defeat Jace, Jace and Jace as the Archenemy in a campaign game.
Your Fate is Thrice Sealed (15 points) - Defeat Gideon, Garruk and Koth as the Archenemy in a campaign game.
Your Puny Minds Cannot Fathom (15 points) - Host a match on Xbox LIVE as the Archenemy.