diff --git a/Mage.Sets/src/mage/cards/n/NilsDisciplineEnforcer.java b/Mage.Sets/src/mage/cards/n/NilsDisciplineEnforcer.java
new file mode 100644
index 00000000000..4496272c952
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/n/NilsDisciplineEnforcer.java
@@ -0,0 +1,119 @@
+package mage.cards.n;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.BeginningOfEndStepTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.costs.mana.ManaCosts;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.common.combat.CantAttackYouUnlessPayManaAllEffect;
+import mage.abilities.effects.common.counter.AddCountersTargetEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.constants.SuperType;
+import mage.constants.TargetController;
+import mage.counters.CounterType;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.TargetPermanent;
+import mage.target.targetadjustment.TargetAdjuster;
+import mage.target.targetpointer.EachTargetPointer;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class NilsDisciplineEnforcer extends CardImpl {
+
+    public NilsDisciplineEnforcer(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{W}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.CLERIC);
+        this.power = new MageInt(2);
+        this.toughness = new MageInt(2);
+
+        // At the beginning of your end step, for each player, put a +1/+1 counter on up to one target creature that player controls.
+        Ability ability = new BeginningOfEndStepTriggeredAbility(
+                new AddCountersTargetEffect(CounterType.P1P1.createInstance())
+                        .setTargetPointer(new EachTargetPointer())
+                        .setText("for each player, put a +1/+1 counter on up to one target creature that player controls"),
+                TargetController.YOU, false
+        );
+        ability.setTargetAdjuster(NilsDisciplineEnforcerAdjuster.instance);
+        this.addAbility(ability);
+
+        // Each creature with one or more counters on it can't attack you or planeswalkers you control unless its controller pays {X}, where X is the number of counters on that creature.
+        this.addAbility(new SimpleStaticAbility(new NilsDisciplineEnforcerEffect()));
+    }
+
+    private NilsDisciplineEnforcer(final NilsDisciplineEnforcer card) {
+        super(card);
+    }
+
+    @Override
+    public NilsDisciplineEnforcer copy() {
+        return new NilsDisciplineEnforcer(this);
+    }
+}
+
+enum NilsDisciplineEnforcerAdjuster implements TargetAdjuster {
+    instance;
+
+    @Override
+    public void adjustTargets(Ability ability, Game game) {
+        ability.getTargets().clear();
+        for (UUID playerId : game.getState().getPlayersInRange(ability.getControllerId(), game)) {
+            Player player = game.getPlayer(playerId);
+            if (player == null) {
+                continue;
+            }
+            FilterPermanent filter = new FilterCreaturePermanent("creature controlled by " + player.getName());
+            ability.addTarget(new TargetPermanent(0, 1, filter));
+        }
+    }
+}
+
+class NilsDisciplineEnforcerEffect extends CantAttackYouUnlessPayManaAllEffect {
+
+    NilsDisciplineEnforcerEffect() {
+        super(null, true);
+        staticText = "Each creature with one or more counters on it can't attack you or planeswalkers you control " +
+                "unless its controller pays {X}, where X is the number of counters on that creature.";
+    }
+
+    private NilsDisciplineEnforcerEffect(NilsDisciplineEnforcerEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public ManaCosts getManaCostToPay(GameEvent event, Ability source, Game game) {
+        Permanent permanent = game.getPermanent(event.getSourceId());
+        if (permanent == null) {
+            return null;
+        }
+        int count = permanent
+                .getCounters(game)
+                .keySet()
+                .stream()
+                .mapToInt(permanent.getCounters(game)::getCount)
+                .sum();
+        if (count < 1) {
+            return null;
+        }
+        return new ManaCostsImpl("{" + count + '}');
+    }
+
+    @Override
+    public NilsDisciplineEnforcerEffect copy() {
+        return new NilsDisciplineEnforcerEffect(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/Commander2021Edition.java b/Mage.Sets/src/mage/sets/Commander2021Edition.java
index 39dcd22697a..e33d71a6de5 100644
--- a/Mage.Sets/src/mage/sets/Commander2021Edition.java
+++ b/Mage.Sets/src/mage/sets/Commander2021Edition.java
@@ -190,6 +190,7 @@ public final class Commander2021Edition extends ExpansionSet {
         cards.add(new SetCardInfo("Myriad Landscape", 304, Rarity.UNCOMMON, mage.cards.m.MyriadLandscape.class));
         cards.add(new SetCardInfo("Naru Meha, Master Wizard", 124, Rarity.MYTHIC, mage.cards.n.NaruMehaMasterWizard.class));
         cards.add(new SetCardInfo("Necropolis Regent", 147, Rarity.MYTHIC, mage.cards.n.NecropolisRegent.class));
+        cards.add(new SetCardInfo("Nils, Discipline Enforcer", 20, Rarity.RARE, mage.cards.n.NilsDisciplineEnforcer.class));
         cards.add(new SetCardInfo("Nissa's Expedition", 200, Rarity.UNCOMMON, mage.cards.n.NissasExpedition.class));
         cards.add(new SetCardInfo("Nissa's Renewal", 201, Rarity.RARE, mage.cards.n.NissasRenewal.class));
         cards.add(new SetCardInfo("Novijen, Heart of Progress", 305, Rarity.UNCOMMON, mage.cards.n.NovijenHeartOfProgress.class));