Name:Tectonic Edge
ManaCost:no cost
Types:Land
A:AB$ Mana | Cost$ T | Produced$ C | SpellDescription$ Add {C}.
A:AB$ Destroy | ValidTgts$ Land.nonBasic | TgtPrompt$ Select target nonbasic land. | Cost$ 1 T Sac<1/CARDNAME> | CheckSVar$ X | SVarCompare$ GE4 | AILogic$ LandForLand | SpellDescription$ Destroy target nonbasic land. Activate only if an opponent controls four or more lands.
SVar:X:PlayerCountOpponents$HighestValid Land.YouCtrl
AI:RemoveDeck:Random
SVar:Picture:http://www.wizards.com/global/images/magic/general/tectonic_edge.jpg
Oracle:{T}: Add {C}.\n{1}, {T}, Sacrifice Tectonic Edge: Destroy target nonbasic land. Activate only if an opponent controls four or more lands.