Terraformer | Magic: The Gathering
Formats Terraformer is Legal in
Official Oracle Text for Terraformer
Official Rulings for Terraformer
10/1/2005 : Changing a land's type doesn't change its name or whether it's legendary or basic.
10/1/2005 : Lands you control will have the mana ability of the basic land type you choose (for example, Forests can tap to produce green mana) and will lose all other innate abilities they had.