make Worms of the Earth into a GlobalRuleChange

forge-game/src/main/java/forge/game/GameAction.java

@@ -258,6 +258,36 @@ public class GameAction {
             }
         }
 
+        // special rule for Worms of the Earth
+        if (toBattlefield && game.getStaticEffects().getGlobalRuleChange(GlobalRuleChange.noLandBattlefield)) {
+            // something that is already a Land cant enter the battlefield
+            if (c.isLand()) {
+                return c;
+            }
+            // check if something would be a land
+            Card noLandLKI = CardUtil.getLKICopy(c);
+            
+            //setZone is not enough
+            //noLandLKI.setZone(zoneTo);
+            noLandLKI.setImmutable(true); // immu doesn't trigger Zone
+            zoneTo.add(noLandLKI);
+            
+            noLandLKI.setImmutable(false); // but need to remove that or Static doesn't find it
+            checkStaticAbilities(false, Sets.newHashSet(noLandLKI));
+
+            boolean noLand = noLandLKI.isLand(); 
+            zoneTo.remove(noLandLKI);
+            
+            // reset static
+            checkStaticAbilities(false, Sets.newHashSet(noLandLKI));
+            
+            if(noLand) {
+                // if something would only be a land when entering the battlefield and not before
+                // put it into the graveyard instead
+                zoneTo = c.getOwner().getZone(ZoneType.Graveyard);
+            }
+        }
+
         if (!suppress) {
             if (zoneFrom == null) {
                 copied.getOwner().addInboundToken(copied);

forge-game/src/main/java/forge/game/GlobalRuleChange.java

@@ -34,7 +34,8 @@ public enum GlobalRuleChange {
     onlyOneBlocker ("No more than one creature can block each combat."),
     onlyTwoBlockers ("No more than two creatures can block each combat."),
     toughnessAssignsDamage ("Each creature assigns combat damage equal to its toughness rather than its power."),
-    blankIsChaos("Each blank roll of the planar dice is a {CHAOS} roll.");
+    blankIsChaos("Each blank roll of the planar dice is a {CHAOS} roll."),
+    noLandBattlefield("Lands can't enter the battlefield.");
     
     private final String ruleText;