diff --git a/Mage.Sets/src/mage/cards/s/ShredderShadowMaster.java b/Mage.Sets/src/mage/cards/s/ShredderShadowMaster.java
new file mode 100644
index 000000000000..8815b884bb67
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/s/ShredderShadowMaster.java
@@ -0,0 +1,144 @@
+package mage.cards.s;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.common.DealsCombatDamageToAPlayerTriggeredAbility;
+import mage.abilities.common.delayed.AtTheEndOfCombatDelayedTriggeredAbility;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.CreateTokenCopyTargetEffect;
+import mage.abilities.effects.common.LoseHalfLifeTargetEffect;
+import mage.abilities.effects.common.SacrificeTargetEffect;
+import mage.constants.SubType;
+import mage.constants.SuperType;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.targetpointer.FixedTarget;
+import mage.target.targetpointer.FixedTargets;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+
+/**
+ *
+ * @author muz
+ */
+public final class ShredderShadowMaster extends CardImpl {
+
+    public ShredderShadowMaster(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{B}{B}");
+
+        this.supertype.add(SuperType.LEGENDARY);
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.NINJA);
+        this.power = new MageInt(5);
+        this.toughness = new MageInt(5);
+
+        // Whenever Shredder attacks a player, for each other opponent, create a token that's a copy of Shredder tapped and attacking that player, except it isn't legendary. Sacrifice those tokens at end of combat.
+        this.addAbility(new ShredderShadowMasterTriggeredAbility());
+
+        // Whenever Shredder deals combat damage to a player, that player loses half their life, rounded up.
+        this.addAbility(new DealsCombatDamageToAPlayerTriggeredAbility(new LoseHalfLifeTargetEffect(), false, true));
+    }
+
+    private ShredderShadowMaster(final ShredderShadowMaster card) {
+        super(card);
+    }
+
+    @Override
+    public ShredderShadowMaster copy() {
+        return new ShredderShadowMaster(this);
+    }
+}
+
+class ShredderShadowMasterTriggeredAbility extends TriggeredAbilityImpl {
+
+    ShredderShadowMasterTriggeredAbility() {
+        super(Zone.BATTLEFIELD, new ShredderShadowMasterEffect());
+        setTriggerPhrase("Whenever {this} attacks a player, ");
+    }
+
+    private ShredderShadowMasterTriggeredAbility(final ShredderShadowMasterTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public ShredderShadowMasterTriggeredAbility copy() {
+        return new ShredderShadowMasterTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.DECLARED_ATTACKERS;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        Player player = game.getPlayer(game.getCombat().getDefenderId(this.getSourceId()));
+        if (player == null) {
+            return false;
+        }
+        this.getEffects().setTargetPointer(new FixedTarget(player.getId()));
+        return true;
+    }
+}
+
+class ShredderShadowMasterEffect extends OneShotEffect {
+
+    ShredderShadowMasterEffect() {
+        super(Outcome.Benefit);
+        this.staticText = "for each other opponent, create a token that's a copy of {this} "
+            + "tapped and attacking that player, except it isn't legendary. "
+            + "Sacrifice those tokens at the end of combat";
+    }
+
+    private ShredderShadowMasterEffect(final ShredderShadowMasterEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public ShredderShadowMasterEffect copy() {
+        return new ShredderShadowMasterEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player controller = game.getPlayer(source.getControllerId());
+        Permanent sourceObject = source.getSourcePermanentOrLKI(game);
+        if (controller == null || sourceObject == null) {
+            return false;
+        }
+
+        UUID defendingPlayerId = game.getCombat().getDefendingPlayerId(source.getSourceId(), game);
+        if (defendingPlayerId == null) {
+            return false;
+        }
+
+        List<Permanent> tokens = new ArrayList<>();
+        for (UUID playerId : game.getState().getPlayersInRange(controller.getId(), game)) {
+            if (!playerId.equals(defendingPlayerId) && controller.hasOpponent(playerId, game)) {
+                Player opponent = game.getPlayer(playerId);
+                if (opponent != null) {
+                    CreateTokenCopyTargetEffect effect = new CreateTokenCopyTargetEffect(controller.getId(), null, false, 1, true, true, playerId).setIsntLegendary(true);
+                    effect.setTargetPointer(new FixedTarget(sourceObject, game));
+                    effect.apply(game, source);
+                    tokens.addAll(effect.getAddedPermanents());
+                }
+            }
+        }
+        if (!tokens.isEmpty()) {
+            SacrificeTargetEffect sacrificeEffect = new SacrificeTargetEffect("sacrifice those tokens");
+            sacrificeEffect.setTargetPointer(new FixedTargets(new ArrayList<>(tokens), game));
+            game.addDelayedTriggeredAbility(new AtTheEndOfCombatDelayedTriggeredAbility(sacrificeEffect), source);
+        }
+        return true;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/TeenageMutantNinjaTurtlesEternal.java b/Mage.Sets/src/mage/sets/TeenageMutantNinjaTurtlesEternal.java
index 4ec61d2b4356..9790a57870b1 100644
--- a/Mage.Sets/src/mage/sets/TeenageMutantNinjaTurtlesEternal.java
+++ b/Mage.Sets/src/mage/sets/TeenageMutantNinjaTurtlesEternal.java
@@ -100,6 +100,8 @@ private TeenageMutantNinjaTurtlesEternal() {
         cards.add(new SetCardInfo("Rocksteady, Mutant Marauder", 33, Rarity.RARE, mage.cards.r.RocksteadyMutantMarauder.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Rocksteady, Mutant Marauder", 94, Rarity.RARE, mage.cards.r.RocksteadyMutantMarauder.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Rootbound Crag", 72, Rarity.RARE, mage.cards.r.RootboundCrag.class));
+        cards.add(new SetCardInfo("Shredder, Shadow Master", 20, Rarity.RARE, mage.cards.s.ShredderShadowMaster.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Shredder, Shadow Master", 88, Rarity.RARE, mage.cards.s.ShredderShadowMaster.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Smoldering Marsh", 73, Rarity.RARE, mage.cards.s.SmolderingMarsh.class));
         cards.add(new SetCardInfo("Sodden Verdure", 74, Rarity.RARE, mage.cards.s.SoddenVerdure.class));
         cards.add(new SetCardInfo("Sol Ring", 59, Rarity.UNCOMMON, mage.cards.s.SolRing.class));