Magic: The Gathering Cheats - PC

Defeat mages quickly in duels
When you play Shanadalar, if your deck has the card in known as the Black Vice, when you put your first Mana out, play the card. That will help damage the enemy enough to win without even bothering to play a single monster. The other way to defeat them is to use the Cursed Rack, but then you would have to make sure that the enemy puts almost all their cards down before they can receive any damage.

Extra gold
Enter and retrieve the gold from the dungeons of the wizards (blue, black, white, red, green). Exit the building, and re enter it. Upon reentry, the castle will have changed, but you will have more gold in it.

Deal extra damage every turn
As soon as you are done with your turn while facing a CPU opponent, (Shandalar, Duel, etc.), click on your opponent's upkeep button on the side bar and play will progress to his turn. You can then click on one of his lands to tap it, and he will take 1 damage Mana Burn or more, depending on the land.