diff --git a/Mage.Sets/src/mage/cards/l/LeafkinAvenger.java b/Mage.Sets/src/mage/cards/l/LeafkinAvenger.java
new file mode 100644
index 0000000000..587e7d4249
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/l/LeafkinAvenger.java
@@ -0,0 +1,68 @@
+package mage.cards.l;
+
+import mage.MageInt;
+import mage.Mana;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.common.PermanentsOnBattlefieldCount;
+import mage.abilities.dynamicvalue.common.SourcePermanentPowerCount;
+import mage.abilities.effects.common.DamageTargetEffect;
+import mage.abilities.mana.DynamicManaAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.ComparisonType;
+import mage.constants.SubType;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.mageobject.PowerPredicate;
+import mage.target.common.TargetPlayerOrPlaneswalker;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class LeafkinAvenger extends CardImpl {
+
+    private static final FilterPermanent filter = new FilterCreaturePermanent("creature you control with power 4 or greater");
+
+    static {
+        filter.add(new PowerPredicate(ComparisonType.MORE_THAN, 3));
+    }
+
+    private static final DynamicValue xValue = new PermanentsOnBattlefieldCount(filter);
+    private static final DynamicValue xValue2 = new SourcePermanentPowerCount(false);
+
+    public LeafkinAvenger(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{R}{G}");
+
+        this.subtype.add(SubType.ELEMENTAL);
+        this.subtype.add(SubType.DRUID);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(3);
+
+        // {T}: Add {G} for each creature you control with power 4 or greater.
+        this.addAbility(new DynamicManaAbility(Mana.GreenMana(1), xValue));
+
+        // {7}{R}: Leafkin Avenger deals damage equal to its power to target player or planeswalker.
+        Ability ability = new SimpleActivatedAbility(
+                new DamageTargetEffect(xValue2)
+                        .setText("{this} deals damage equal to its power to target player or planeswalker"),
+                new ManaCostsImpl("{7}{R}")
+        );
+        ability.addTarget(new TargetPlayerOrPlaneswalker());
+        this.addAbility(ability);
+    }
+
+    private LeafkinAvenger(final LeafkinAvenger card) {
+        super(card);
+    }
+
+    @Override
+    public LeafkinAvenger copy() {
+        return new LeafkinAvenger(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/CoreSet2021.java b/Mage.Sets/src/mage/sets/CoreSet2021.java
index 91536f727a..a213df1e94 100644
--- a/Mage.Sets/src/mage/sets/CoreSet2021.java
+++ b/Mage.Sets/src/mage/sets/CoreSet2021.java
@@ -149,6 +149,7 @@ public final class CoreSet2021 extends ExpansionSet {
         cards.add(new SetCardInfo("Keen Glidemaster", 54, Rarity.COMMON, mage.cards.k.KeenGlidemaster.class));
         cards.add(new SetCardInfo("Keral Keep Disciples", 334, Rarity.UNCOMMON, mage.cards.k.KeralKeepDisciples.class));
         cards.add(new SetCardInfo("Kitesail Freebooter", 107, Rarity.UNCOMMON, mage.cards.k.KitesailFreebooter.class));
+        cards.add(new SetCardInfo("Leafkin Avenger", 220, Rarity.UNCOMMON, mage.cards.l.LeafkinAvenger.class));
         cards.add(new SetCardInfo("Legion's Judgment", 24, Rarity.COMMON, mage.cards.l.LegionsJudgment.class));
         cards.add(new SetCardInfo("Library Larcenist", 55, Rarity.COMMON, mage.cards.l.LibraryLarcenist.class));
         cards.add(new SetCardInfo("Life Goes On", 192, Rarity.COMMON, mage.cards.l.LifeGoesOn.class));