diff --git a/Mage.Sets/src/mage/cards/m/MistwaySpy.java b/Mage.Sets/src/mage/cards/m/MistwaySpy.java
new file mode 100644
index 00000000000..8f64b24fbda
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/m/MistwaySpy.java
@@ -0,0 +1,83 @@
+package mage.cards.m;
+
+import mage.MageInt;
+import mage.abilities.DelayedTriggeredAbility;
+import mage.abilities.common.TurnedFaceUpSourceTriggeredAbility;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.common.CreateDelayedTriggeredAbilityEffect;
+import mage.abilities.effects.keyword.InvestigateEffect;
+import mage.abilities.keyword.DisguiseAbility;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Duration;
+import mage.constants.SubType;
+import mage.game.Game;
+import mage.game.events.DamagedEvent;
+import mage.game.events.GameEvent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class MistwaySpy extends CardImpl {
+
+    public MistwaySpy(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{U}");
+
+        this.subtype.add(SubType.MERFOLK);
+        this.subtype.add(SubType.DETECTIVE);
+        this.power = new MageInt(1);
+        this.toughness = new MageInt(1);
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // Disguise {1}{U}
+        this.addAbility(new DisguiseAbility(this, new ManaCostsImpl<>("{1}{U}")));
+
+        // When Mistway Spy is turned face up, until end of turn, whenever a creature you control deals combat damage to a player, investigate.
+        this.addAbility(new TurnedFaceUpSourceTriggeredAbility(
+                new CreateDelayedTriggeredAbilityEffect(new MistwaySpyTriggeredAbility())
+                        .setText("until end of turn, whenever a creature you control deals combat damage to a player, investigate")
+        ));
+    }
+
+    private MistwaySpy(final MistwaySpy card) {
+        super(card);
+    }
+
+    @Override
+    public MistwaySpy copy() {
+        return new MistwaySpy(this);
+    }
+}
+
+class MistwaySpyTriggeredAbility extends DelayedTriggeredAbility {
+
+    MistwaySpyTriggeredAbility() {
+        super(new InvestigateEffect(), Duration.EndOfTurn, false, false);
+        setTriggerPhrase("Whenever a creature you control deals combat damage to a player, ");
+    }
+
+    private MistwaySpyTriggeredAbility(final MistwaySpyTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public MistwaySpyTriggeredAbility copy() {
+        return new MistwaySpyTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.DAMAGED_PLAYER;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        return ((DamagedEvent) event).isCombatDamage() && isControlledBy(game.getControllerId(event.getSourceId()));
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
index bfdbe2fcf4a..45930487ce7 100644
--- a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
+++ b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
@@ -119,6 +119,7 @@ public final class MurdersAtKarlovManor extends ExpansionSet {
         cards.add(new SetCardInfo("Massacre Girl, Known Killer", 94, Rarity.MYTHIC, mage.cards.m.MassacreGirlKnownKiller.class));
         cards.add(new SetCardInfo("Meddling Youths", 219, Rarity.UNCOMMON, mage.cards.m.MeddlingYouths.class));
         cards.add(new SetCardInfo("Meticulous Archive", 264, Rarity.RARE, mage.cards.m.MeticulousArchive.class));
+        cards.add(new SetCardInfo("Mistway Spy", 65, Rarity.UNCOMMON, mage.cards.m.MistwaySpy.class));
         cards.add(new SetCardInfo("Mountain", 275, Rarity.LAND, mage.cards.basiclands.Mountain.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("Murder", 95, Rarity.COMMON, mage.cards.m.Murder.class));
         cards.add(new SetCardInfo("Museum Nightwatch", 25, Rarity.COMMON, mage.cards.m.MuseumNightwatch.class));