diff --git a/Mage.Sets/src/mage/cards/l/LumberingMegasloth.java b/Mage.Sets/src/mage/cards/l/LumberingMegasloth.java
new file mode 100644
index 00000000000..3afaa51da09
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/l/LumberingMegasloth.java
@@ -0,0 +1,104 @@
+package mage.cards.l;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTappedAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.common.cost.SpellCostReductionForEachSourceEffect;
+import mage.abilities.hint.Hint;
+import mage.abilities.hint.ValueHint;
+import mage.abilities.keyword.TrampleAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.constants.Zone;
+import mage.game.Game;
+
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * @author Susucr
+ */
+public final class LumberingMegasloth extends CardImpl {
+
+    public LumberingMegasloth(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{10}{G}{G}");
+
+        this.subtype.add(SubType.SLOTH);
+        this.subtype.add(SubType.MUTANT);
+        this.power = new MageInt(8);
+        this.toughness = new MageInt(8);
+        // This spell costs {1} less to cast for each counter among players and permanents.
+        this.addAbility(
+                new SimpleStaticAbility(Zone.ALL,
+                        new SpellCostReductionForEachSourceEffect(1, LumberingMegaslothValue.instance)
+                ).addHint(LumberingMegaslothValue.getHint())
+        );
+
+        // Trample
+        this.addAbility(TrampleAbility.getInstance());
+
+        // Lumbering Megasloth enters the battlefield tapped.
+        this.addAbility(new EntersBattlefieldTappedAbility());
+    }
+
+    private LumberingMegasloth(final LumberingMegasloth card) {
+        super(card);
+    }
+
+    @Override
+    public LumberingMegasloth copy() {
+        return new LumberingMegasloth(this);
+    }
+}
+
+enum LumberingMegaslothValue implements DynamicValue {
+    instance;
+
+    private static final Hint hint = new ValueHint("Number of Counters:", instance);
+
+    public static Hint getHint() {
+        return hint;
+    }
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        int onPermanents = game.getBattlefield()
+                .getActivePermanents(sourceAbility.getControllerId(), game)
+                .stream()
+                .filter(Objects::nonNull)
+                .map(perm -> perm.getCounters(game))
+                .flatMap(counters -> counters.values().stream())
+                .mapToInt(counter -> counter.getCount())
+                .sum();
+        int onPlayers = game.getState()
+                .getPlayersInRange(sourceAbility.getControllerId(), game)
+                .stream()
+                .map(game::getPlayer)
+                .filter(Objects::nonNull)
+                .map(player -> player.getCounters())
+                .flatMap(counters -> counters.values().stream())
+                .mapToInt(counter -> counter.getCount())
+                .sum();
+        return onPermanents + onPlayers;
+    }
+
+    @Override
+    public LumberingMegaslothValue copy() {
+        return this;
+    }
+
+    @Override
+    public String toString() {
+        return "1";
+    }
+
+    @Override
+    public String getMessage() {
+        return "counters among players and permanents";
+    }
+}
\ No newline at end of file
diff --git a/Mage.Sets/src/mage/sets/Fallout.java b/Mage.Sets/src/mage/sets/Fallout.java
index 0499628ac53..46468a7eeb6 100644
--- a/Mage.Sets/src/mage/sets/Fallout.java
+++ b/Mage.Sets/src/mage/sets/Fallout.java
@@ -172,6 +172,7 @@ public final class Fallout extends ExpansionSet {
         cards.add(new SetCardInfo("Lily Bowen, Raging Grandma", 927, Rarity.RARE, mage.cards.l.LilyBowenRagingGrandma.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Lord of the Undead", 345, Rarity.RARE, mage.cards.l.LordOfTheUndead.class));
         cards.add(new SetCardInfo("Loyal Apprentice", 190, Rarity.UNCOMMON, mage.cards.l.LoyalApprentice.class));
+        cards.add(new SetCardInfo("Lumbering Megasloth", 80, Rarity.UNCOMMON, mage.cards.l.LumberingMegasloth.class));
         cards.add(new SetCardInfo("MacCready, Lamplight Mayor", 108, Rarity.RARE, mage.cards.m.MacCreadyLamplightMayor.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("MacCready, Lamplight Mayor", 417, Rarity.RARE, mage.cards.m.MacCreadyLamplightMayor.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("MacCready, Lamplight Mayor", 636, Rarity.RARE, mage.cards.m.MacCreadyLamplightMayor.class, NON_FULL_USE_VARIOUS));
diff --git a/Mage.Tests/src/test/java/org/mage/test/cards/single/pip/LumberingMegaslothTest.java b/Mage.Tests/src/test/java/org/mage/test/cards/single/pip/LumberingMegaslothTest.java
new file mode 100644
index 00000000000..bf4d38cb2ff
--- /dev/null
+++ b/Mage.Tests/src/test/java/org/mage/test/cards/single/pip/LumberingMegaslothTest.java
@@ -0,0 +1,43 @@
+package org.mage.test.cards.single.pip;
+
+import mage.constants.PhaseStep;
+import mage.constants.Zone;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestPlayerBase;
+
+/**
+ * @author Susucr
+ */
+public class LumberingMegaslothTest extends CardTestPlayerBase {
+
+    /**
+     * {@link mage.cards.l.LumberingMegasloth Lumbering Megasloth} {10}{G}{G}
+     * Creature — Sloth Mutant
+     * This spell costs {1} less to cast for each counter among players and permanents.
+     * Trample
+     * Lumbering Megasloth enters the battlefield tapped.
+     * <p>
+     * 8/8
+     */
+    private static final String sloth = "Lumbering Megasloth";
+
+    @Test
+    public void test_Reduction() {
+        setStrictChooseMode(true);
+
+        addCard(Zone.HAND, playerA, sloth);
+        addCard(Zone.BATTLEFIELD, playerA, "Adaptive Shimmerer"); // enters with 3 +1/+1
+        addCard(Zone.HAND, playerA, "Aether Herder"); // {3}{G}, etb: you get {E}{E}
+        addCard(Zone.BATTLEFIELD, playerB, "Arlinn Kord"); // PW with 3 loyalty counters
+        addCard(Zone.BATTLEFIELD, playerA, "Forest", 4 + 4); // 4 for Herder, then 4 for sloth as 9 counters total.
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Aether Herder", true);
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, sloth);
+
+        setStopAt(1, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertPermanentCount(playerA, sloth, 1);
+        assertTappedCount("Forest", true, 8);
+    }
+}