Name:Tectonic Edge
ManaCost:no cost
Types:Land
A:AB$ Mana | Cost$ T | Produced$ C | SpellDescription$ Add {C} to your mana pool.
A:AB$ Destroy | ValidTgts$ Land.nonBasic | TgtPrompt$ Select target nonbasic land. | Cost$ 1 T Sac<1/CARDNAME> | IsPresent$ Land.OppCtrl | PresentCompare$ GE4 | AILogic$ LandForLand | SpellDescription$ Destroy target nonbasic land. Activate this ability only if an opponent controls four or more lands.
SVar:RemRandomDeck:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/tectonic_edge.jpg
Oracle:{T}: Add {C} to your mana pool.\n{1}, {T}, Sacrifice Tectonic Edge: Destroy target nonbasic land. Activate this ability only if an opponent controls four or more lands.