- Added the SVar NeedsToPlay. The AI won't play cards with it unless a valid card is on the battlefield.

- Updated the Lairs to use it.

src/forge/ComputerUtil.java

@@ -762,6 +762,19 @@ public class ComputerUtil
 		  for (Card crd : lands)
 			  landList.add(crd);
 	  }
+	  
+	  landList = landList.filter(new CardListFilter() {
+			 public boolean addCard(Card c) {
+				 if (c.getSVar("NeedsToPlay").length() > 0) {
+			          String needsToPlay = c.getSVar("NeedsToPlay");
+			          CardList list = AllZoneUtil.getCardsInPlay();
+						
+						list = list.getValidCards(needsToPlay.split(","), c.getController(), c);
+			          if (list.isEmpty()) return false;
+			      } 
+				 return true;
+			 }
+		 });
 
 	  while(!landList.isEmpty() && computer.canPlayLand()){
 		  // play as many lands as you can

src/forge/card/spellability/Spell_Permanent.java

@@ -228,6 +228,14 @@ public class Spell_Permanent extends Spell {
     		return false;
     	}
         
+        if (card.getSVar("NeedsToPlay").length() > 0) {
+            String needsToPlay = card.getSVar("NeedsToPlay");
+            CardList list = AllZoneUtil.getCardsInPlay();
+			
+			list = list.getValidCards(needsToPlay.split(","), card.getController(), card);
+            if (list.isEmpty()) return false;
+        }     
+        
         if (!checkETBEffects(card, this, null))
         	return false;