diff --git a/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/effects/CancelActivatedEffect.java b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/effects/CancelActivatedEffect.java
new file mode 100644
index 000000000..8ac3e1eb3
--- /dev/null
+++ b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/effects/CancelActivatedEffect.java
@@ -0,0 +1,23 @@
+package com.gempukku.lotro.cards.effects;
+
+import com.gempukku.lotro.game.state.LotroGame;
+import com.gempukku.lotro.logic.effects.ActivateCardEffect;
+import com.gempukku.lotro.logic.timing.UnrespondableEffect;
+
+public class CancelActivatedEffect extends UnrespondableEffect {
+    private String _playerId;
+    private ActivateCardEffect _effect;
+
+    public CancelActivatedEffect(String playerId, ActivateCardEffect effect) {
+        _playerId = playerId;
+        _effect = effect;
+    }
+
+    @Override
+    public void doPlayEffect(LotroGame game) {
+        if (!_effect.isCancelled()) {
+            game.getGameState().sendMessage(_playerId + " cancels effect - " + _effect.getText(game));
+            _effect.cancel();
+        }
+    }
+}
diff --git a/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set4/isengard/Card4_155.java b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set4/isengard/Card4_155.java
new file mode 100644
index 000000000..396d4002b
--- /dev/null
+++ b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set4/isengard/Card4_155.java
@@ -0,0 +1,56 @@
+package com.gempukku.lotro.cards.set4.isengard;
+
+import com.gempukku.lotro.cards.AbstractResponseEvent;
+import com.gempukku.lotro.cards.PlayConditions;
+import com.gempukku.lotro.cards.actions.PlayEventAction;
+import com.gempukku.lotro.cards.effects.CancelActivatedEffect;
+import com.gempukku.lotro.cards.effects.ChooseAndExertCharactersEffect;
+import com.gempukku.lotro.common.CardType;
+import com.gempukku.lotro.common.Culture;
+import com.gempukku.lotro.common.Side;
+import com.gempukku.lotro.filters.Filters;
+import com.gempukku.lotro.game.PhysicalCard;
+import com.gempukku.lotro.game.state.LotroGame;
+import com.gempukku.lotro.logic.effects.ActivateCardEffect;
+import com.gempukku.lotro.logic.timing.Effect;
+import com.gempukku.lotro.logic.timing.EffectResult;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Set: The Two Towers
+ * Side: Shadow
+ * Culture: Isengard
+ * Twilight Cost: 0
+ * Type: Event
+ * Game Text: Response: If a special ability of an ally or unbound companion is used, exert Grima to cancel that action.
+ */
+public class Card4_155 extends AbstractResponseEvent {
+    public Card4_155() {
+        super(Side.SHADOW, Culture.ISENGARD, "Haunting Her Steps");
+    }
+
+    @Override
+    public int getTwilightCost() {
+        return 0;
+    }
+
+    @Override
+    public List<PlayEventAction> getOptionalBeforeActions(String playerId, LotroGame game, Effect effect, PhysicalCard self) {
+        if (effect.getType() == EffectResult.Type.ACTIVATE
+                && PlayConditions.canExert(self, game, Filters.name("Grima"))) {
+            ActivateCardEffect activateEffect = (ActivateCardEffect) effect;
+            final PhysicalCard source = activateEffect.getSource();
+            if (Filters.or(Filters.unboundCompanion(), Filters.type(CardType.ALLY)).accepts(game.getGameState(), game.getModifiersQuerying(), source)) {
+                PlayEventAction action = new PlayEventAction(self);
+                action.appendCost(
+                        new ChooseAndExertCharactersEffect(action, playerId, 1, 1, Filters.name("Grima")));
+                action.appendEffect(
+                        new CancelActivatedEffect(playerId, activateEffect));
+                return Collections.singletonList(action);
+            }
+        }
+        return null;
+    }
+}