diff --git a/Mage.Sets/src/mage/cards/c/CoralColony.java b/Mage.Sets/src/mage/cards/c/CoralColony.java
new file mode 100644
index 00000000000..fdccb4f6115
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/c/CoralColony.java
@@ -0,0 +1,65 @@
+package mage.cards.c;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.common.PermanentsOnBattlefieldCount;
+import mage.abilities.effects.common.MillCardsTargetEffect;
+import mage.abilities.hint.Hint;
+import mage.abilities.hint.ValueHint;
+import mage.abilities.keyword.DefenderAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterControlledCreaturePermanent;
+import mage.filter.predicate.mageobject.AbilityPredicate;
+import mage.target.TargetPlayer;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class CoralColony extends CardImpl {
+
+    private static final FilterPermanent filter
+            = new FilterControlledCreaturePermanent("creatures you control with defender");
+
+    static {
+        filter.add(new AbilityPredicate(DefenderAbility.class));
+    }
+
+    private static final DynamicValue xValue = new PermanentsOnBattlefieldCount(filter);
+    private static final Hint hint = new ValueHint("Creatures with defender you control", xValue);
+
+    public CoralColony(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{U}");
+
+        this.subtype.add(SubType.WALL);
+        this.power = new MageInt(1);
+        this.toughness = new MageInt(4);
+
+        // Defender
+        this.addAbility(DefenderAbility.getInstance());
+
+        // {1}{U}, {T}: Target player mills X cards, where X is the number of cards you control with defender.
+        Ability ability = new SimpleActivatedAbility(new MillCardsTargetEffect(xValue), new ManaCostsImpl<>("{1}{U}"));
+        ability.addCost(new TapSourceCost());
+        ability.addTarget(new TargetPlayer());
+        this.addAbility(ability);
+    }
+
+    private CoralColony(final CoralColony card) {
+        super(card);
+    }
+
+    @Override
+    public CoralColony copy() {
+        return new CoralColony(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/DominariaUnited.java b/Mage.Sets/src/mage/sets/DominariaUnited.java
index d6ac0f91d4b..844431519a5 100644
--- a/Mage.Sets/src/mage/sets/DominariaUnited.java
+++ b/Mage.Sets/src/mage/sets/DominariaUnited.java
@@ -69,6 +69,7 @@ public final class DominariaUnited extends ExpansionSet {
         cards.add(new SetCardInfo("Coalition Warbrute", 118, Rarity.COMMON, mage.cards.c.CoalitionWarbrute.class));
         cards.add(new SetCardInfo("Colossal Growth", 158, Rarity.COMMON, mage.cards.c.ColossalGrowth.class));
         cards.add(new SetCardInfo("Contaminated Aquifer", 245, Rarity.COMMON, mage.cards.c.ContaminatedAquifer.class));
+        cards.add(new SetCardInfo("Coral Colony", 45, Rarity.UNCOMMON, mage.cards.c.CoralColony.class));
         cards.add(new SetCardInfo("Cosmic Epiphany", 283, Rarity.RARE, mage.cards.c.CosmicEpiphany.class));
         cards.add(new SetCardInfo("Crystal Grotto", 246, Rarity.COMMON, mage.cards.c.CrystalGrotto.class));
         cards.add(new SetCardInfo("Cult Conscript", 88, Rarity.UNCOMMON, mage.cards.c.CultConscript.class));