diff --git a/Mage.Sets/src/mage/cards/h/HarbingerOfTheSeas.java b/Mage.Sets/src/mage/cards/h/HarbingerOfTheSeas.java
new file mode 100644
index 00000000000..f7856b72692
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/h/HarbingerOfTheSeas.java
@@ -0,0 +1,96 @@
+package mage.cards.h;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.ContinuousEffectImpl;
+import mage.abilities.mana.BlueManaAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.common.FilterLandPermanent;
+import mage.filter.predicate.Predicates;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+
+import java.util.UUID;
+
+/**
+ * @author Susucr
+ */
+public final class HarbingerOfTheSeas extends CardImpl {
+
+    public HarbingerOfTheSeas(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{U}{U}");
+
+        this.subtype.add(SubType.MERFOLK);
+        this.subtype.add(SubType.WIZARD);
+        this.power = new MageInt(2);
+        this.toughness = new MageInt(2);
+
+        // Nonbasic lands are Islands.
+        this.addAbility(new SimpleStaticAbility(new HarbingerOfTheSeasEffect()));
+    }
+
+    private HarbingerOfTheSeas(final HarbingerOfTheSeas card) {
+        super(card);
+    }
+
+    @Override
+    public HarbingerOfTheSeas copy() {
+        return new HarbingerOfTheSeas(this);
+    }
+}
+
+// Very similar to Magus of the Moon
+class HarbingerOfTheSeasEffect extends ContinuousEffectImpl {
+
+    private static final FilterLandPermanent filter = new FilterLandPermanent();
+
+    static {
+        filter.add(Predicates.not(SuperType.BASIC.getPredicate()));
+    }
+
+    HarbingerOfTheSeasEffect() {
+        super(Duration.WhileOnBattlefield, Outcome.Detriment);
+        this.staticText = "Nonbasic lands are Islands";
+        dependencyTypes.add(DependencyType.BecomeIsland);
+    }
+
+    private HarbingerOfTheSeasEffect(final HarbingerOfTheSeasEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return false;
+    }
+
+    @Override
+    public HarbingerOfTheSeasEffect copy() {
+        return new HarbingerOfTheSeasEffect(this);
+    }
+
+    @Override
+    public boolean apply(Layer layer, SubLayer sublayer, Ability source, Game game) {
+        for (Permanent land : game.getBattlefield().getActivePermanents(filter, source.getControllerId(), game)) {
+            switch (layer) {
+                case TypeChangingEffects_4:
+                    // 305.7 Note that this doesn't remove any abilities that were granted to the land by other effects
+                    // So the ability removing has to be done before Layer 6
+                    land.removeAllAbilities(source.getSourceId(), game);
+                    land.removeAllSubTypes(game, SubTypeSet.NonBasicLandType);
+                    land.addSubType(game, SubType.ISLAND);
+                    // Islands have the blue mana ability intrinsically so the ability must be added in this layer
+                    land.addAbility(new BlueManaAbility(), source.getSourceId(), game);
+                    break;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public boolean hasLayer(Layer layer) {
+        return layer == Layer.TypeChangingEffects_4;
+    }
+}
diff --git a/Mage.Sets/src/mage/cards/m/MagusOfTheMoon.java b/Mage.Sets/src/mage/cards/m/MagusOfTheMoon.java
index 97e3237f87e..4d1beec9ae5 100644
--- a/Mage.Sets/src/mage/cards/m/MagusOfTheMoon.java
+++ b/Mage.Sets/src/mage/cards/m/MagusOfTheMoon.java
@@ -20,12 +20,6 @@ import java.util.UUID;
  */
 public final class MagusOfTheMoon extends CardImpl {
 
-    private static final FilterLandPermanent filter = new FilterLandPermanent();
-
-    static {
-        filter.add(Predicates.not(SuperType.BASIC.getPredicate()));
-    }
-
     public MagusOfTheMoon(UUID ownerId, CardSetInfo setInfo) {
         super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{R}");
         this.subtype.add(SubType.HUMAN);
@@ -35,7 +29,7 @@ public final class MagusOfTheMoon extends CardImpl {
         this.toughness = new MageInt(2);
 
         // Nonbasic lands are Mountains.
-        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new MagusOfTheMoonEffect()));
+        this.addAbility(new SimpleStaticAbility(new MagusOfTheMoonEffect()));
     }
 
     private MagusOfTheMoon(final MagusOfTheMoon card) {
@@ -47,50 +41,56 @@ public final class MagusOfTheMoon extends CardImpl {
         return new MagusOfTheMoon(this);
     }
 
-    static class MagusOfTheMoonEffect extends ContinuousEffectImpl {
+}
 
-        MagusOfTheMoonEffect() {
-            super(Duration.WhileOnBattlefield, Outcome.Detriment);
-            this.staticText = "Nonbasic lands are Mountains";
-            dependencyTypes.add(DependencyType.BecomeMountain);
-        }
+class MagusOfTheMoonEffect extends ContinuousEffectImpl {
 
-        private MagusOfTheMoonEffect(final MagusOfTheMoonEffect effect) {
-            super(effect);
-        }
+    private static final FilterLandPermanent filter = new FilterLandPermanent();
 
-        @Override
-        public boolean apply(Game game, Ability source) {
-            return false;
-        }
-
-        @Override
-        public MagusOfTheMoonEffect copy() {
-            return new MagusOfTheMoonEffect(this);
-        }
-
-        @Override
-        public boolean apply(Layer layer, SubLayer sublayer, Ability source, Game game) {
-            for (Permanent land : game.getBattlefield().getActivePermanents(filter, source.getControllerId(), game)) {
-                switch (layer) {
-                    case TypeChangingEffects_4:
-                        // 305.7 Note that this doesn't remove any abilities that were granted to the land by other effects
-                        // So the ability removing has to be done before Layer 6
-                        land.removeAllAbilities(source.getSourceId(), game);
-                        land.removeAllSubTypes(game, SubTypeSet.NonBasicLandType);
-                        land.addSubType(game, SubType.MOUNTAIN);
-                        // Mountains have the red mana ability intrinsically so the ability must be added in this layer
-                        land.addAbility(new RedManaAbility(), source.getSourceId(), game);
-                        break;
-                }
-            }
-            return true;
-        }
-
-        @Override
-        public boolean hasLayer(Layer layer) {
-            return layer == Layer.TypeChangingEffects_4;
-        }
+    static {
+        filter.add(Predicates.not(SuperType.BASIC.getPredicate()));
     }
 
+    MagusOfTheMoonEffect() {
+        super(Duration.WhileOnBattlefield, Outcome.Detriment);
+        this.staticText = "Nonbasic lands are Mountains";
+        dependencyTypes.add(DependencyType.BecomeMountain);
+    }
+
+    private MagusOfTheMoonEffect(final MagusOfTheMoonEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return false;
+    }
+
+    @Override
+    public MagusOfTheMoonEffect copy() {
+        return new MagusOfTheMoonEffect(this);
+    }
+
+    @Override
+    public boolean apply(Layer layer, SubLayer sublayer, Ability source, Game game) {
+        for (Permanent land : game.getBattlefield().getActivePermanents(filter, source.getControllerId(), game)) {
+            switch (layer) {
+                case TypeChangingEffects_4:
+                    // 305.7 Note that this doesn't remove any abilities that were granted to the land by other effects
+                    // So the ability removing has to be done before Layer 6
+                    land.removeAllAbilities(source.getSourceId(), game);
+                    land.removeAllSubTypes(game, SubTypeSet.NonBasicLandType);
+                    land.addSubType(game, SubType.MOUNTAIN);
+                    // Mountains have the red mana ability intrinsically so the ability must be added in this layer
+                    land.addAbility(new RedManaAbility(), source.getSourceId(), game);
+                    break;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public boolean hasLayer(Layer layer) {
+        return layer == Layer.TypeChangingEffects_4;
+    }
 }
diff --git a/Mage.Sets/src/mage/sets/ModernHorizons3.java b/Mage.Sets/src/mage/sets/ModernHorizons3.java
index b44dc7fb3aa..b89693b7743 100644
--- a/Mage.Sets/src/mage/sets/ModernHorizons3.java
+++ b/Mage.Sets/src/mage/sets/ModernHorizons3.java
@@ -67,6 +67,7 @@ public final class ModernHorizons3 extends ExpansionSet {
         cards.add(new SetCardInfo("Grist, Voracious Larva", 251, Rarity.MYTHIC, mage.cards.g.GristVoraciousLarva.class));
         cards.add(new SetCardInfo("Grist, the Plague Swarm", 251, Rarity.MYTHIC, mage.cards.g.GristThePlagueSwarm.class));
         cards.add(new SetCardInfo("Guide of Souls", 29, Rarity.RARE, mage.cards.g.GuideOfSouls.class));
+        cards.add(new SetCardInfo("Harbinger of the Seas", 63, Rarity.RARE, mage.cards.h.HarbingerOfTheSeas.class));
         cards.add(new SetCardInfo("Island", 305, Rarity.LAND, mage.cards.basiclands.Island.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("It That Heralds the End", 9, Rarity.UNCOMMON, mage.cards.i.ItThatHeraldsTheEnd.class));
         cards.add(new SetCardInfo("Jet Medallion", 292, Rarity.RARE, mage.cards.j.JetMedallion.class));