diff --git a/Mage.Sets/src/mage/cards/m/ManascapeRefractor.java b/Mage.Sets/src/mage/cards/m/ManascapeRefractor.java
index 076f44dda0a..0f7995d9b36 100644
--- a/Mage.Sets/src/mage/cards/m/ManascapeRefractor.java
+++ b/Mage.Sets/src/mage/cards/m/ManascapeRefractor.java
@@ -73,7 +73,7 @@ class ManascapeRefractorGainAbilitiesEffect extends ContinuousEffectImpl {
     public boolean apply(Game game, Ability source) {
         Permanent perm = game.getPermanent(source.getSourceId());
         if (perm == null) {
-            return true;
+            return false;
         }
         for (Ability ability : game.getState()
                 .getBattlefield()
@@ -85,6 +85,7 @@ class ManascapeRefractorGainAbilitiesEffect extends ContinuousEffectImpl {
                 .filter(ability -> ability.getAbilityType() == AbilityType.ACTIVATED
                         || ability.getAbilityType() == AbilityType.MANA)
                 .collect(Collectors.toList())) {
+            // optimization to disallow the adding of duplicate, unnecessary basic mana abilities
             if (!(ability instanceof BasicManaAbility)
                     || perm.getAbilities(game)
                     .stream()
diff --git a/Mage.Sets/src/mage/cards/r/RobaranMercenaries.java b/Mage.Sets/src/mage/cards/r/RobaranMercenaries.java
new file mode 100644
index 00000000000..95060b484b9
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/r/RobaranMercenaries.java
@@ -0,0 +1,100 @@
+package mage.cards.r;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.ContinuousEffectImpl;
+import mage.abilities.keyword.VigilanceAbility;
+import mage.abilities.mana.BasicManaAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.common.FilterControlledCreaturePermanent;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+
+import java.util.Collection;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+/**
+ * @author PurpleCrowbar
+ */
+public final class RobaranMercenaries extends CardImpl {
+
+    public RobaranMercenaries(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{W}");
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.MERCENARY);
+
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(4);
+
+        // Vigilance
+        this.addAbility(VigilanceAbility.getInstance());
+
+        // Robaran Mercenaries has all activated abilties of all legendary creatures you control.
+        this.addAbility(new SimpleStaticAbility(new RobaranMercenariesEffect()));
+    }
+
+    private RobaranMercenaries(final RobaranMercenaries card) {
+        super(card);
+    }
+
+    @Override
+    public RobaranMercenaries copy() {
+        return new RobaranMercenaries(this);
+    }
+}
+
+class RobaranMercenariesEffect extends ContinuousEffectImpl {
+
+    private static final FilterControlledCreaturePermanent filter = new FilterControlledCreaturePermanent();
+
+    static {
+        filter.add(SuperType.LEGENDARY.getPredicate());
+    }
+
+    RobaranMercenariesEffect() {
+        super(Duration.WhileOnBattlefield, Layer.AbilityAddingRemovingEffects_6, SubLayer.NA, Outcome.AddAbility);
+        staticText = "{this} has all activated abilities of all legendary creatures you control.";
+        this.addDependencyType(DependencyType.AddingAbility);
+    }
+
+    private RobaranMercenariesEffect(final RobaranMercenariesEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent perm = game.getPermanent(source.getSourceId());
+        if (perm == null) {
+            return false;
+        }
+        for (Ability ability : game.getState()
+                .getBattlefield()
+                .getActivePermanents(filter, source.getControllerId(), source, game)
+                .stream()
+                .map(permanent -> permanent.getAbilities(game))
+                .flatMap(Collection::stream)
+                .filter(Objects::nonNull)
+                .filter(ability -> ability.getAbilityType() == AbilityType.ACTIVATED
+                        || ability.getAbilityType() == AbilityType.MANA)
+                .collect(Collectors.toList())) {
+            // optimization to disallow the adding of duplicate, unnecessary basic mana abilities
+            if (!(ability instanceof BasicManaAbility)
+                    || perm.getAbilities(game)
+                    .stream()
+                    .noneMatch(ability.getClass()::isInstance)) {
+                perm.addAbility(ability, source.getSourceId(), game);
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public RobaranMercenariesEffect copy() {
+        return new RobaranMercenariesEffect(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/DominariaUnitedCommander.java b/Mage.Sets/src/mage/sets/DominariaUnitedCommander.java
index 3a1f2e03f2f..65f94ca70f1 100644
--- a/Mage.Sets/src/mage/sets/DominariaUnitedCommander.java
+++ b/Mage.Sets/src/mage/sets/DominariaUnitedCommander.java
@@ -150,9 +150,11 @@ public final class DominariaUnitedCommander extends ExpansionSet {
         cards.add(new SetCardInfo("Read the Bones", 117, Rarity.COMMON, mage.cards.r.ReadTheBones.class));
         cards.add(new SetCardInfo("Reliquary Tower", 227, Rarity.UNCOMMON, mage.cards.r.ReliquaryTower.class));
         cards.add(new SetCardInfo("Rienne, Angel of Rebirth", 166, Rarity.MYTHIC, mage.cards.r.RienneAngelOfRebirth.class));
+        cards.add(new SetCardInfo("Robaran Mercenaries", 22, Rarity.RARE, mage.cards.r.RobaranMercenaries.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Robaran Mercenaries", 72, Rarity.RARE, mage.cards.r.RobaranMercenaries.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Rocky Tar Pit", 228, Rarity.UNCOMMON, mage.cards.r.RockyTarPit.class));
         cards.add(new SetCardInfo("Rohgahh, Kher Keep Overlord", 41, Rarity.RARE, mage.cards.r.RohgahhKherKeepOverlord.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Rohgahh, Kher Keep Overlord", 63, Rarity.RARE, mage.cards.r.RohgahhKherKeepOverlord.class, NON_FULL_USE_VARIOUS));
-        cards.add(new SetCardInfo("Rocky Tar Pit", 228, Rarity.UNCOMMON, mage.cards.r.RockyTarPit.class));
         cards.add(new SetCardInfo("Rosnakht, Heir of Rohgahh", 25, Rarity.RARE, mage.cards.r.RosnakhtHeirOfRohgahh.class));
         cards.add(new SetCardInfo("Sandsteppe Citadel", 229, Rarity.UNCOMMON, mage.cards.s.SandsteppeCitadel.class));
         cards.add(new SetCardInfo("Savage Lands", 230, Rarity.UNCOMMON, mage.cards.s.SavageLands.class));