made Hexproof a singleton

Mage.Sets/src/mage/sets/eventide/SlipperyBogle.java

@@ -50,7 +50,7 @@ public class SlipperyBogle extends CardImpl<SlipperyBogle> {
         this.power = new MageInt(1);
         this.toughness = new MageInt(1);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
     }
 
     public SlipperyBogle(final SlipperyBogle card) {

Mage.Sets/src/mage/sets/innistrad/AngelicOverseer.java

@@ -68,7 +68,7 @@ public class AngelicOverseer extends CardImpl<AngelicOverseer> {
         this.addAbility(FlyingAbility.getInstance());
 
         // As long as you control a Human, Angelic Overseer has hexproof and is indestructible.
-        Ability ability = new ConditionalStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilitySourceEffect(new HexproofAbility()), new ControlsPermanentCondition(filter), rule);
+        Ability ability = new ConditionalStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilitySourceEffect(HexproofAbility.getInstance()), new ControlsPermanentCondition(filter), rule);
         ability.addEffect(new GainAbilitySourceEffect(IndestructibleAbility.getInstance()));
         this.addAbility(ability);
     }

Mage.Sets/src/mage/sets/innistrad/GeistOfSaintTraft.java

@@ -64,7 +64,7 @@ public class GeistOfSaintTraft extends CardImpl<GeistOfSaintTraft> {
         this.power = new MageInt(2);
         this.toughness = new MageInt(2);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
         // Whenever Geist of Saint Traft attacks, put a 4/4 white Angel creature token with flying onto the battlefield tapped and attacking. Exile that token at end of combat.
         this.addAbility(new AttacksTriggeredAbility(new GeistOfSaintTraftEffect(), false));
     }

Mage.Sets/src/mage/sets/innistrad/InvisibleStalker.java

@@ -51,7 +51,7 @@ public class InvisibleStalker extends CardImpl<InvisibleStalker> {
         this.power = new MageInt(1);
         this.toughness = new MageInt(1);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
         // Invisible Stalker is unblockable.
         this.addAbility(UnblockableAbility.getInstance());
     }

Mage.Sets/src/mage/sets/innistrad/Lumberknot.java

@@ -52,7 +52,7 @@ public class Lumberknot extends CardImpl<Lumberknot> {
         this.power = new MageInt(1);
         this.toughness = new MageInt(1);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
         // Whenever a creature dies, put a +1/+1 counter on Lumberknot.
         this.addAbility(new CreatureDiesTriggeredAbility(new AddCountersSourceEffect(CounterType.P1P1.createInstance()), false));
     }

Mage.Sets/src/mage/sets/innistrad/MaskOfAvacyn.java

@@ -54,7 +54,7 @@ public class MaskOfAvacyn extends CardImpl<MaskOfAvacyn> {
         this.addAbility(new EquipAbility(Constants.Outcome.AddAbility, new GenericManaCost(3)));
 
         // Equipped creature gets +1/+2 and has hexproof.
-        this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityAttachedEffect(new HexproofAbility(), Constants.AttachmentType.EQUIPMENT)));
+        this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityAttachedEffect(HexproofAbility.getInstance(), Constants.AttachmentType.EQUIPMENT)));
         this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new BoostEquippedEffect(1, 2)));
     }
 

Mage.Sets/src/mage/sets/innistrad/RangersGuile.java

@@ -52,7 +52,7 @@ public class RangersGuile extends CardImpl<RangersGuile> {
         // Target creature you control gets +1/+1 and gains hexproof until end of turn.
         this.getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
         this.getSpellAbility().addEffect(new BoostTargetEffect(1, 1, Duration.EndOfTurn));
-        this.getSpellAbility().addEffect(new GainAbilityTargetEffect(new HexproofAbility(), Duration.EndOfTurn));
+        this.getSpellAbility().addEffect(new GainAbilityTargetEffect(HexproofAbility.getInstance(), Duration.EndOfTurn));
     }
 
     public RangersGuile(final RangersGuile card) {

Mage.Sets/src/mage/sets/magic2011/SacredWolf.java

@@ -30,16 +30,10 @@ package mage.sets.magic2011;
 
 import java.util.UUID;
 import mage.Constants.CardType;
-import mage.Constants.Duration;
 import mage.Constants.Rarity;
-import mage.Constants.TargetController;
-import mage.Constants.Zone;
 import mage.MageInt;
-import mage.abilities.common.SimpleStaticAbility;
-import mage.abilities.effects.common.CantTargetSourceEffect;
 import mage.abilities.keyword.HexproofAbility;
 import mage.cards.CardImpl;
-import mage.filter.FilterStackObject;
 
 /**
  *
@@ -53,7 +47,7 @@ public class SacredWolf extends CardImpl<SacredWolf> {
 		this.color.setGreen(true);
 		this.power = new MageInt(3);
 		this.toughness = new MageInt(1);
-		this.addAbility(new HexproofAbility());
+		this.addAbility(HexproofAbility.getInstance());
 	}
 
 	public SacredWolf(final SacredWolf card) {

Mage.Sets/src/mage/sets/magic2012/AvenFleetwing.java

@@ -51,7 +51,7 @@ public class AvenFleetwing extends CardImpl<AvenFleetwing> {
         this.power = new MageInt(2);
         this.toughness = new MageInt(2);
         this.addAbility(FlyingAbility.getInstance());
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
     }
 
     public AvenFleetwing(final AvenFleetwing card) {

Mage.Sets/src/mage/sets/magic2012/DungroveElder.java

@@ -63,7 +63,7 @@ public class DungroveElder extends CardImpl<DungroveElder> {
         this.power = new MageInt(0);
         this.toughness = new MageInt(0);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
         this.addAbility(new SimpleStaticAbility(Zone.ALL, new SetPowerToughnessSourceEffect(new PermanentsOnBattlefieldCount(filterLands), Duration.EndOfGame)));
     }
 

Mage.Sets/src/mage/sets/magic2012/GladecoverScout.java

@@ -49,7 +49,7 @@ public class GladecoverScout extends CardImpl<GladecoverScout> {
         this.color.setGreen(true);
         this.power = new MageInt(1);
         this.toughness = new MageInt(1);
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
     }
 
     public GladecoverScout(final GladecoverScout card) {

Mage.Sets/src/mage/sets/magic2012/LordOfTheUnreal.java

@@ -64,7 +64,7 @@ public class LordOfTheUnreal extends CardImpl<LordOfTheUnreal> {
         this.power = new MageInt(2);
         this.toughness = new MageInt(2);
         Ability ability = new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new BoostControlledEffect(1, 1, Constants.Duration.WhileOnBattlefield, filter, false));
-        ability.addEffect(new GainAbilityControlledEffect(new HexproofAbility(), Constants.Duration.WhileOnBattlefield, filter, false));
+        ability.addEffect(new GainAbilityControlledEffect(HexproofAbility.getInstance(), Constants.Duration.WhileOnBattlefield, filter, false));
         this.addAbility(ability);
     }
 

Mage.Sets/src/mage/sets/magic2012/SwiftfootBoots.java

@@ -52,7 +52,7 @@ public class SwiftfootBoots extends CardImpl<SwiftfootBoots> {
         super(ownerId, 219, "Swiftfoot Boots", Rarity.UNCOMMON, new CardType[]{CardType.ARTIFACT}, "{2}");
         this.expansionSetCode = "M12";
         this.subtype.add("Equipment");
-        this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityAttachedEffect(new HexproofAbility(), Constants.AttachmentType.EQUIPMENT)));
+        this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityAttachedEffect(HexproofAbility.getInstance(), Constants.AttachmentType.EQUIPMENT)));
         this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityAttachedEffect(HasteAbility.getInstance(), Constants.AttachmentType.EQUIPMENT)));
         this.addAbility(new EquipAbility(Constants.Outcome.AddAbility, new GenericManaCost(1)));
         

Mage.Sets/src/mage/sets/mirrodin/LeoninAbunas.java

@@ -58,7 +58,7 @@ public class LeoninAbunas extends CardImpl<LeoninAbunas> {
         this.color.setWhite(true);
         this.power = new MageInt(2);
         this.toughness = new MageInt(5);
-        this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityControlledEffect(new HexproofAbility(), Constants.Duration.WhileOnBattlefield, filter, false)));
+        this.addAbility(new SimpleStaticAbility(Constants.Zone.BATTLEFIELD, new GainAbilityControlledEffect(HexproofAbility.getInstance(), Constants.Duration.WhileOnBattlefield, filter, false)));
     }
 
     public LeoninAbunas(final LeoninAbunas card) {

Mage.Sets/src/mage/sets/mirrodin/PlatedSlagwurm.java

@@ -49,7 +49,7 @@ public class PlatedSlagwurm extends CardImpl<PlatedSlagwurm> {
         this.power = new MageInt(8);
         this.toughness = new MageInt(8);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
     }
 
     public PlatedSlagwurm(final PlatedSlagwurm card) {

Mage.Sets/src/mage/sets/mirrodin/TrollAscetic.java

@@ -56,7 +56,7 @@ public class TrollAscetic extends CardImpl<TrollAscetic> {
 		this.color.setGreen(true);
         this.power = new MageInt(3);
         this.toughness = new MageInt(2);
-		this.addAbility(new HexproofAbility());
+		this.addAbility(HexproofAbility.getInstance());
 		this.addAbility(new SimpleActivatedAbility(Constants.Zone.BATTLEFIELD, new RegenerateSourceEffect(), new ManaCostsImpl("{1}{G}")));
     }
 

Mage.Sets/src/mage/sets/mirrodinbesieged/ThrunTheLastTroll.java

@@ -59,7 +59,7 @@ public class ThrunTheLastTroll extends CardImpl<ThrunTheLastTroll> {
         this.toughness = new MageInt(4);
 
         this.addAbility(new SimpleStaticAbility(Zone.ALL, new CantCounterSourceEffect()));
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
         this.addAbility(new SimpleActivatedAbility(Zone.BATTLEFIELD, new RegenerateSourceEffect(), new ManaCostsImpl("{1}{G}")));
     }
 

Mage.Sets/src/mage/sets/shadowmoor/DroveOfElves.java

@@ -62,7 +62,7 @@ public class DroveOfElves extends CardImpl<DroveOfElves> {
         this.power = new MageInt(0);
         this.toughness = new MageInt(0);
 
-        this.addAbility(new HexproofAbility());
+        this.addAbility(HexproofAbility.getInstance());
         // Drove of Elves's power and toughness are each equal to the number of green permanents you control.
         this.addAbility(new SimpleStaticAbility(Zone.ALL, new SetPowerToughnessSourceEffect(new PermanentsOnBattlefieldCount(filter), Duration.WhileOnBattlefield)));
     }

Mage.Sets/src/mage/sets/zendikar/VinesOfVastwood.java

@@ -55,7 +55,7 @@ public class VinesOfVastwood extends CardImpl<VinesOfVastwood> {
         this.color.setGreen(true);
         TargetCreaturePermanent target = new TargetCreaturePermanent();
         this.getSpellAbility().addTarget(target);
-        this.getSpellAbility().addEffect(new GainAbilityTargetEffect(new HexproofAbility(), Duration.EndOfTurn));
+        this.getSpellAbility().addEffect(new GainAbilityTargetEffect(HexproofAbility.getInstance(), Duration.EndOfTurn));
 
         this.getSpellAbility().addOptionalCost(new KickerManaCost("{G}"));
         this.getSpellAbility().addEffect(new ConditionalContinousEffect(new BoostTargetEffect(4, 4, Duration.EndOfTurn),

Mage/src/mage/abilities/keyword/HexproofAbility.java

@@ -1,5 +1,6 @@
 package mage.abilities.keyword;
 
+import java.io.ObjectStreamException;
 import mage.Constants;
 import mage.abilities.common.SimpleStaticAbility;
 import mage.abilities.effects.common.CantTargetSourceEffect;
@@ -7,28 +8,29 @@ import mage.filter.FilterStackObject;
 
 /**
  * Hexproof
- * (This creature can't be the target of spells or abilities your opponents control.)
+ * (This creature or player can't be the target of spells or abilities your opponents control.)
  *
  * @author loki
  */
 public class HexproofAbility extends SimpleStaticAbility {
-    private static final FilterStackObject filter = new FilterStackObject("spells or abilities your opponents control");
 
-	static {
+	private static final HexproofAbility fINSTANCE =  new HexproofAbility();
-		filter.setTargetController(Constants.TargetController.OPPONENT);
+ 
+	private Object readResolve() throws ObjectStreamException {
+		return fINSTANCE;
 	}
 
-    public HexproofAbility() {
+	public static HexproofAbility getInstance() {
-        super(Constants.Zone.BATTLEFIELD, new CantTargetSourceEffect(filter, Constants.Duration.WhileOnBattlefield));
+		return fINSTANCE;
 	}
 
-    public HexproofAbility(final HexproofAbility ability) {
+   private HexproofAbility() {
-        super(ability);
+        super(Constants.Zone.BATTLEFIELD, new CantTargetSourceEffect(new FilterStackObject("spells or abilities your opponents control"), Constants.Duration.WhileOnBattlefield));
     }
 
     @Override
-    public SimpleStaticAbility copy() {
+    public HexproofAbility copy() {
-        return new HexproofAbility(this);
+        return fINSTANCE;
     }
 
     @Override