1 May 2008
All your lands will have the chosen land type and no other land type.
1 May 2008
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.
1 May 2008
Changing a land's type doesn't change its name or whether it's legendary or basic.