Magic: The Gathering Online Cheats & Codes for PC 

Magic: The Gathering Online is a video game adaptation of Magic: The Gathering, utilizing the concept of a virtual economy to preserve the collectible aspect of the card game. It is played through an Internet service operated by Wizards of the Coast, which went live on June 24, 2002. Users can play the game or trade cards with other users. It is only officially available for the Microsoft Windows operating system.
Cheat codes, console commands, secrets:
Undo Mana tapping:
Press [Alt] + [U] to undo mana tapping.
Cheat codes, console commands, secrets and system requirements for Magic: The Gathering Online free online.

Game description

Microsoft Windows
Game Developer:
Leaping Lizard Software (initial) Wizards of the Coast (v2.0 and on)
Game Genre:
Digital collectible card game
Game Mode:
Game Publisher:
Wizards of the CoastPlatform(s)