diff --git a/Mage.Sets/src/mage/cards/d/DeathsShadow.java b/Mage.Sets/src/mage/cards/d/DeathsShadow.java
index 6bae1cb5898..71c65af311f 100644
--- a/Mage.Sets/src/mage/cards/d/DeathsShadow.java
+++ b/Mage.Sets/src/mage/cards/d/DeathsShadow.java
@@ -47,14 +47,14 @@ import mage.constants.Zone;
 public class DeathsShadow extends CardImpl {
 
     public DeathsShadow(UUID ownerId, CardSetInfo setInfo) {
-        super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{B}");
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{B}");
         this.subtype.add(SubType.AVATAR);
 
         this.power = new MageInt(13);
         this.toughness = new MageInt(13);
 
         // Death's Shadow gets -X/-X, where X is your life total.
-        SignInversionDynamicValue x = new SignInversionDynamicValue(new ControllerLifeCount());
+        SignInversionDynamicValue x = new SignInversionDynamicValue(new ControllerLifeCount(), false);
         this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new BoostSourceEffect(x, x, Duration.WhileOnBattlefield)));
     }
 
diff --git a/Mage/src/main/java/mage/abilities/dynamicvalue/common/SignInversionDynamicValue.java b/Mage/src/main/java/mage/abilities/dynamicvalue/common/SignInversionDynamicValue.java
index 6f630c48617..db00aa1ccbe 100644
--- a/Mage/src/main/java/mage/abilities/dynamicvalue/common/SignInversionDynamicValue.java
+++ b/Mage/src/main/java/mage/abilities/dynamicvalue/common/SignInversionDynamicValue.java
@@ -8,18 +8,30 @@ import mage.game.Game;
 public class SignInversionDynamicValue implements DynamicValue {
 
     private final DynamicValue value;
+    private final boolean canBePositive;
 
     public SignInversionDynamicValue(DynamicValue value) {
+        this(value, true);
+    }
+
+    public SignInversionDynamicValue(DynamicValue value, boolean canBePositive) {
         this.value = value.copy();
+        this.canBePositive = canBePositive;
     }
 
     SignInversionDynamicValue(final SignInversionDynamicValue dynamicValue) {
         this.value = dynamicValue.value.copy();
+        this.canBePositive = dynamicValue.canBePositive;
     }
 
     @Override
     public int calculate(Game game, Ability sourceAbility, Effect effect) {
-        return -1 * value.calculate(game, sourceAbility, effect);
+        int amount = value.calculate(game, sourceAbility, effect);
+        if (amount >= 0 || canBePositive) {
+            return -1 * amount;
+        } else {
+            return 0;
+        }
     }
 
     @Override