Gaea's Revenge | Magic: The Gathering
Formats Gaea's Revenge is Legal in
Official Oracle Text for Gaea's Revenge
Gaea's Revenge can't be the target of nongreen spells or abilities from nongreen sources.
Official Rulings for Gaea's Revenge
8/15/2010 : A Gaea's Revenge spell can be targeted by spells and abilities that try to counter it (such as Cancel). Those spells and abilities will resolve, but the part of their effect that would counter Gaea's Revenge won't do anything. Any other effects those spells and abilities have will work as normal.
8/15/2010 : Gaea's Revenge's last ability applies to all nongreen spells and abilities from nongreen sources, including ones you control. For example, you can't target it with the equip ability of an Equipment you control (unless the Equipment is somehow green).