diff --git a/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set11/site/Card11_258.java b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set11/site/Card11_258.java
new file mode 100644
index 000000000..8b5b5883c
--- /dev/null
+++ b/gemp-lotr/gemp-lotr-cards/src/main/java/com/gempukku/lotro/cards/set11/site/Card11_258.java
@@ -0,0 +1,38 @@
+package com.gempukku.lotro.cards.set11.site;
+
+import com.gempukku.lotro.cards.AbstractNewSite;
+import com.gempukku.lotro.cards.TriggerConditions;
+import com.gempukku.lotro.cards.effects.AddBurdenEffect;
+import com.gempukku.lotro.common.CardType;
+import com.gempukku.lotro.common.Keyword;
+import com.gempukku.lotro.game.PhysicalCard;
+import com.gempukku.lotro.game.state.LotroGame;
+import com.gempukku.lotro.logic.actions.RequiredTriggerAction;
+import com.gempukku.lotro.logic.timing.EffectResult;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Set: Shadows
+ * Twilight Cost: 1
+ * Type: Site
+ * Game Text: Battleground. Each time a companion is killed, add a burden.
+ */
+public class Card11_258 extends AbstractNewSite {
+    public Card11_258() {
+        super("Slag Mounds", 1, Direction.RIGHT);
+        addKeyword(Keyword.BATTLEGROUND);
+    }
+
+    @Override
+    public List<RequiredTriggerAction> getRequiredAfterTriggers(LotroGame game, EffectResult effectResult, PhysicalCard self) {
+        if (TriggerConditions.forEachKilled(game, effectResult, CardType.COMPANION)) {
+            RequiredTriggerAction action = new RequiredTriggerAction(self);
+            action.appendEffect(
+                    new AddBurdenEffect(self, 1));
+            return Collections.singletonList(action);
+        }
+        return null;
+    }
+}