The problem with lands like this and their potential combinations with Doubling Season / Gilder Bairn or Proliferate is that you still have to spend mana to get mana. Usually, getting a net gain isn't worth it unless you have an 
cost worth paying.
But if you're patient, I suppose it wouldn't be bad.
Posted By:
Weretarrasque
(2/22/2011 8:28:52 AM)
In a green/red deck with ways to untap land outside your untap step and Doubling Season, this could be good for the late game.
Posted By:
A3Kitsune
(5/15/2010 6:27:55 AM)
And then they made the Mercadian Bazaar cycle of cards-- Saprazzan Cove, Subterranean Hangar, Fountain of Cho, etc.
Posted By:
raptorman333
(5/23/2013 11:43:15 AM)