diff --git a/Mage.Sets/src/mage/cards/c/CavernousMaw.java b/Mage.Sets/src/mage/cards/c/CavernousMaw.java
new file mode 100644
index 00000000000..32379092ed1
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/c/CavernousMaw.java
@@ -0,0 +1,97 @@
+package mage.cards.c;
+
+import mage.abilities.Ability;
+import mage.abilities.condition.IntCompareCondition;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.decorator.ConditionalActivatedAbility;
+import mage.abilities.dynamicvalue.AdditiveDynamicValue;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.common.CardsInControllerGraveyardCount;
+import mage.abilities.dynamicvalue.common.PermanentsOnBattlefieldCount;
+import mage.abilities.effects.common.continuous.BecomesCreatureSourceEffect;
+import mage.abilities.hint.Hint;
+import mage.abilities.hint.ValueHint;
+import mage.abilities.mana.ColorlessManaAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.ComparisonType;
+import mage.constants.Duration;
+import mage.constants.SubType;
+import mage.filter.FilterCard;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterControlledPermanent;
+import mage.filter.predicate.mageobject.AnotherPredicate;
+import mage.game.Game;
+import mage.game.permanent.token.custom.CreatureToken;
+
+import java.util.UUID;
+
+/**
+ * @author Susucr
+ */
+public final class CavernousMaw extends CardImpl {
+
+    public CavernousMaw(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.LAND}, "");
+
+        this.subtype.add(SubType.CAVE);
+
+        // {T}: Add {C}.
+        this.addAbility(new ColorlessManaAbility());
+
+        // {2}: Cavernous Maw becomes a 3/3 Elemental creature until end of turn. It's still a Cave land. Activate only if the number of other Caves you control plus the number of Cave cards in your graveyard is three or greater.
+        this.addAbility(new ConditionalActivatedAbility(
+                new BecomesCreatureSourceEffect(
+                        new CreatureToken(3, 3, "3/3 Elemental creature")
+                                .withSubType(SubType.ELEMENTAL),
+                        CardType.LAND, Duration.EndOfTurn
+                ),
+                new ManaCostsImpl<>("{2}"),
+                new CavernousMawCondition()
+        ).addHint(CavernousMawCondition.hint));
+    }
+
+    private CavernousMaw(final CavernousMaw card) {
+        super(card);
+    }
+
+    @Override
+    public CavernousMaw copy() {
+        return new CavernousMaw(this);
+    }
+}
+
+class CavernousMawCondition extends IntCompareCondition {
+
+    private static final FilterPermanent filter
+            = new FilterControlledPermanent(SubType.CAVE, "other Caves you control");
+
+    private static final FilterCard filterCard = new FilterCard("Cave cards");
+
+    static {
+        filter.add(AnotherPredicate.instance);
+        filterCard.add(SubType.CAVE.getPredicate());
+    }
+
+    private static final DynamicValue xValue = new AdditiveDynamicValue(
+            new PermanentsOnBattlefieldCount(filter, null),
+            new CardsInControllerGraveyardCount(filterCard)
+    );
+
+    static Hint hint = new ValueHint("Caves count", xValue);
+
+    CavernousMawCondition() {
+        super(ComparisonType.OR_GREATER, 3);
+    }
+
+    @Override
+    protected int getInputValue(Game game, Ability source) {
+        return xValue.calculate(game, source, null);
+    }
+
+    @Override
+    public String toString() {
+        return "if the number of other Caves you control plus the number of Cave cards in your graveyard is three or greater";
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/TheLostCavernsOfIxalan.java b/Mage.Sets/src/mage/sets/TheLostCavernsOfIxalan.java
index 890697d1b4e..31f918137cd 100644
--- a/Mage.Sets/src/mage/sets/TheLostCavernsOfIxalan.java
+++ b/Mage.Sets/src/mage/sets/TheLostCavernsOfIxalan.java
@@ -33,6 +33,7 @@ public final class TheLostCavernsOfIxalan extends ExpansionSet {
         cards.add(new SetCardInfo("Captain Storm, Cosmium Raider", 227, Rarity.UNCOMMON, mage.cards.c.CaptainStormCosmiumRaider.class));
         cards.add(new SetCardInfo("Careening Mine Cart", 247, Rarity.UNCOMMON, mage.cards.c.CareeningMineCart.class));
         cards.add(new SetCardInfo("Cavern of Souls", 269, Rarity.MYTHIC, mage.cards.c.CavernOfSouls.class));
+        cards.add(new SetCardInfo("Cavernous Maw", 270, Rarity.UNCOMMON, mage.cards.c.CavernousMaw.class));
         cards.add(new SetCardInfo("Cenote Scout", 178, Rarity.UNCOMMON, mage.cards.c.CenoteScout.class));
         cards.add(new SetCardInfo("Chart a Course", 48, Rarity.UNCOMMON, mage.cards.c.ChartACourse.class));
         cards.add(new SetCardInfo("Clay-Fired Bricks", 6, Rarity.UNCOMMON, mage.cards.c.ClayFiredBricks.class));