diff --git a/Mage.Sets/src/mage/cards/n/NoWitnesses.java b/Mage.Sets/src/mage/cards/n/NoWitnesses.java
new file mode 100644
index 00000000000..35da3f0aba7
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/n/NoWitnesses.java
@@ -0,0 +1,88 @@
+package mage.cards.n;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.DestroyAllEffect;
+import mage.abilities.effects.keyword.InvestigateEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.filter.StaticFilters;
+import mage.game.Controllable;
+import mage.game.Game;
+
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+/**
+ * @author TheElk801
+ */
+public final class NoWitnesses extends CardImpl {
+
+    public NoWitnesses(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{2}{W}{W}");
+
+        // Each player who controls the most creatures investigates. Then destroy all creatures.
+        this.getSpellAbility().addEffect(new NoWitnessesEffect());
+        this.getSpellAbility().addEffect(new DestroyAllEffect(StaticFilters.FILTER_PERMANENT_CREATURES).concatBy("Then"));
+    }
+
+    private NoWitnesses(final NoWitnesses card) {
+        super(card);
+    }
+
+    @Override
+    public NoWitnesses copy() {
+        return new NoWitnesses(this);
+    }
+}
+
+class NoWitnessesEffect extends OneShotEffect {
+
+    NoWitnessesEffect() {
+        super(Outcome.Benefit);
+        staticText = "each player who controls the most creatures investigates";
+    }
+
+    private NoWitnessesEffect(final NoWitnessesEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public NoWitnessesEffect copy() {
+        return new NoWitnessesEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Map<UUID, Integer> map = game
+                .getBattlefield()
+                .getActivePermanents(
+                        StaticFilters.FILTER_PERMANENT_CREATURE,
+                        source.getControllerId(), source, game
+                )
+                .stream()
+                .filter(Objects::nonNull)
+                .map(Controllable::getControllerId)
+                .collect(Collectors.toMap(Function.identity(), x -> 1, Integer::sum));
+        if (map.isEmpty()) {
+            return false;
+        }
+        int maxValue = map
+                .values()
+                .stream()
+                .mapToInt(x -> x)
+                .max()
+                .orElse(0);
+        for (UUID playerId : game.getState().getPlayersInRange(source.getControllerId(), game)) {
+            if (map.getOrDefault(playerId, -1) >= maxValue) {
+                InvestigateEffect.doInvestigate(playerId, 1, game, source);
+            }
+        }
+        return true;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
index 81f65a4ee75..2d01ac473d6 100644
--- a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
+++ b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
@@ -65,6 +65,7 @@ public final class MurdersAtKarlovManor extends ExpansionSet {
         cards.add(new SetCardInfo("Mountain", 275, Rarity.LAND, mage.cards.basiclands.Mountain.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("Nightdrinker Moroii", 96, Rarity.UNCOMMON, mage.cards.n.NightdrinkerMoroii.class));
         cards.add(new SetCardInfo("No More Lies", 221, Rarity.UNCOMMON, mage.cards.n.NoMoreLies.class));
+        cards.add(new SetCardInfo("No Witnesses", 27, Rarity.RARE, mage.cards.n.NoWitnesses.class));
         cards.add(new SetCardInfo("Not on My Watch", 28, Rarity.UNCOMMON, mage.cards.n.NotOnMyWatch.class));
         cards.add(new SetCardInfo("Novice Inspector", 29, Rarity.COMMON, mage.cards.n.NoviceInspector.class));
         cards.add(new SetCardInfo("Out Cold", 66, Rarity.COMMON, mage.cards.o.OutCold.class));
diff --git a/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateEffect.java b/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateEffect.java
index c1025776cba..9d54181fc11 100644
--- a/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateEffect.java
+++ b/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateEffect.java
@@ -10,6 +10,8 @@ import mage.game.events.GameEvent;
 import mage.game.permanent.token.ClueArtifactToken;
 import mage.util.CardUtil;
 
+import java.util.UUID;
+
 /**
  * @author LevelX2
  */
@@ -39,14 +41,21 @@ public class InvestigateEffect extends OneShotEffect {
     @Override
     public boolean apply(Game game, Ability source) {
         int value = this.amount.calculate(game, source, this);
-        if (value < 1) {
-            return false;
+        if (value > 0) {
+            doInvestigate(source.getControllerId(), value, game, source);
+            return true;
         }
-        new ClueArtifactToken().putOntoBattlefield(value, game, source, source.getControllerId());
+        return false;
+    }
+
+    public static void doInvestigate(UUID playerId, int value, Game game, Ability source) {
+        new ClueArtifactToken().putOntoBattlefield(value, game, source, playerId);
         for (int i = 0; i < value; i++) {
-            game.fireEvent(GameEvent.getEvent(GameEvent.EventType.INVESTIGATED, source.getSourceId(), source, source.getControllerId()));
+            game.fireEvent(GameEvent.getEvent(
+                    GameEvent.EventType.INVESTIGATED,
+                    source.getSourceId(), source, playerId
+            ));
         }
-        return true;
     }
 
     @Override
diff --git a/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateTargetEffect.java b/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateTargetEffect.java
index f9ac666d3f2..e21522e7fe7 100644
--- a/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateTargetEffect.java
+++ b/Mage/src/main/java/mage/abilities/effects/keyword/InvestigateTargetEffect.java
@@ -7,8 +7,6 @@ import mage.abilities.dynamicvalue.common.StaticValue;
 import mage.abilities.effects.OneShotEffect;
 import mage.constants.Outcome;
 import mage.game.Game;
-import mage.game.events.GameEvent;
-import mage.game.permanent.token.ClueArtifactToken;
 import mage.players.Player;
 
 /**
@@ -43,14 +41,11 @@ public class InvestigateTargetEffect extends OneShotEffect {
             return false;
         }
         int value = this.amount.calculate(game, source, this);
-        if (value < 1) {
-            return false;
+        if (value > 0) {
+            InvestigateEffect.doInvestigate(targetPlayer.getId(), value, game, source);
+            return true;
         }
-        new ClueArtifactToken().putOntoBattlefield(value, game, source, targetPlayer.getId());
-        for (int i = 0; i < value; i++) {
-            game.fireEvent(GameEvent.getEvent(GameEvent.EventType.INVESTIGATED, source.getSourceId(), source, targetPlayer.getId()));
-        }
-        return true;
+        return false;
     }
 
     @Override