When copying costs, make sure to recache the TapCost state.

forge-game/src/main/java/forge/game/cost/Cost.java

@@ -51,12 +51,23 @@ public class Cost implements Serializable {
     private final List<CostPart> costParts = Lists.newArrayList();
     private boolean isMandatory = false;
 
+    // Primarily used for Summoning Sickness awareness
     private boolean tapCost = false;
 
     public final boolean hasTapCost() {
         return this.tapCost;
     }
 
+    private void cacheTapCost() {
+        tapCost = false;
+        for (CostPart p : getCostParts()) {
+            if (p instanceof CostTap || p instanceof CostUntap) {
+                tapCost = true;
+                return;
+            }
+        }
+    }
+
     public final boolean hasNoManaCost() {
         return this.getCostMana() == null;
     }
@@ -508,6 +519,7 @@ public class Cost implements Serializable {
         for (CostPart cp : this.costParts) {
             toRet.costParts.add(cp.copy());
         }
+        toRet.cacheTapCost();
         return toRet;
     }
     
@@ -518,12 +530,14 @@ public class Cost implements Serializable {
             if (!(cp instanceof CostPartMana))
                 toRet.costParts.add(cp.copy());
         }
+        toRet.cacheTapCost();
         return toRet;
     }
 
     public final Cost copyWithDefinedMana(String manaCost) {
         Cost toRet = copyWithNoMana();
         toRet.costParts.add(new CostPartMana(new ManaCost(new ManaCostParser(manaCost)), null));
+        toRet.cacheTapCost();
         return toRet;
     }