* Fixed a bug that mana source restrictins got lost with mana cost madification (e.g. cast Myr Superion while Etherium Sculptor in play).

Mage.Tests/src/test/java/org/mage/test/cards/cost/modification/CostModificationTest.java

@@ -45,4 +45,51 @@ public class CostModificationTest extends CardTestPlayerBase {
         assertGraveyardCount(playerA, 1);
     }
 
+    /**
+     * Test that cost reduction also works with mana source restriction
+     * Myr Superion
+     * Spend only mana produced by creatures to cast Myr Superion
+     *
+     * Etherium Sculptor    {1}{U}
+     * Artifact Creature - Vedalken Artificer
+     * 1/2
+     * Artifact spells you cast cost {1} less to cast.
+     */
+
+    @Test
+    public void testCostReductionWithManaSourceRestrictionWorking() {
+        addCard(Zone.BATTLEFIELD, playerA, "Etherium Sculptor");
+        addCard(Zone.BATTLEFIELD, playerA, "Llanowar Elves");
+
+        addCard(Zone.HAND, playerA, "Myr Superion");
+
+        activateAbility(3, PhaseStep.PRECOMBAT_MAIN, playerA, "Add {G} to your mana pool.");
+        castSpell(3, PhaseStep.PRECOMBAT_MAIN, playerA, "Myr Superion");
+        setStopAt(3, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertLife(playerA, 20);
+        assertLife(playerB, 20);
+
+        assertPermanentCount(playerA, "Myr Superion", 1); // Can be cast because mana was produced by a creature
+    }
+
+    @Test
+    public void testCostReductionWithManaSourceRestrictionNotWorking() {
+        addCard(Zone.BATTLEFIELD, playerA, "Etherium Sculptor");
+        addCard(Zone.BATTLEFIELD, playerA, "Mountain");
+
+        addCard(Zone.HAND, playerA, "Myr Superion");
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Myr Superion");
+        setStopAt(1, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertLife(playerA, 20);
+        assertLife(playerB, 20);
+
+        assertPermanentCount(playerA, "Myr Superion", 0); // Can't be cast because mana was not produced by a creature
+        assertHandCount(playerA, "Myr Superion", 1); // Can't be cast because mana was not produced by a creature
+    }
+
 }

Mage/src/mage/abilities/costs/mana/ManaCostsImpl.java

@@ -422,7 +422,12 @@ public class ManaCostsImpl<T extends ManaCost> extends ArrayList<T> implements M
 
     @Override
     public Filter getSourceFilter() {
-        throw new UnsupportedOperationException("Not supported yet.");
+        for (T cost : this) {
+            if (cost.getSourceFilter() != null) {
+                return cost.getSourceFilter();
+            }
+        }
+        return null;
     }
 
     @Override

Mage/src/mage/abilities/effects/common/cost/SpellsCostReductionControllerEffect.java

@@ -102,7 +102,7 @@ public class SpellsCostReductionControllerEffect extends CostModificationEffectI
                 if (spell != null) {
                     return this.filter.match(spell, game);
                 } else {
-                    // used at least for flashback ability because Flashback ability doesn't use stack
+                    // used at least for flashback ability because Flashback ability doesn't use stack or for getPlayables where spell is not cast yet
                     Card sourceCard = game.getCard(abilityToModify.getSourceId());
                     return sourceCard != null && this.filter.match(sourceCard, game);
                 }

Mage/src/mage/util/CardUtil.java

@@ -195,7 +195,7 @@ public class CardUtil {
     
     private static ManaCosts<ManaCost> adjustCost(ManaCosts<ManaCost> manaCosts, int reduceCount) {
         int restToReduce = reduceCount;
-        ManaCosts<ManaCost> adjustedCost = new ManaCostsImpl<>();
+        ManaCosts<ManaCost> adjustedCost = new ManaCostsImpl<>();        
         boolean updated = false;
         for (ManaCost manaCost : manaCosts) {
             Mana mana = manaCost.getOptions().get(0);
@@ -217,7 +217,7 @@ public class CardUtil {
         if (!updated && reduceCount < 0) {
             adjustedCost.add(new GenericManaCost(-reduceCount));
         }
-        
+        adjustedCost.setSourceFilter(manaCosts.getSourceFilter());
         return adjustedCost;
     }
 
@@ -255,7 +255,7 @@ public class CardUtil {
      */
     public static void adjustCost(SpellAbility spellAbility, ManaCosts<ManaCost> manaCostsToReduce, boolean convertToGeneric) {
         ManaCosts<ManaCost> previousCost = spellAbility.getManaCostsToPay();
-        ManaCosts<ManaCost> adjustedCost = new ManaCostsImpl<>();
+        ManaCosts<ManaCost> adjustedCost = new ManaCostsImpl<>();        
         // save X value (e.g. convoke ability)
         for (VariableCost vCost: previousCost.getVariableCosts()) {
             if (vCost instanceof VariableManaCost) {
@@ -352,7 +352,7 @@ public class CardUtil {
                 adjustedCost.add(0, new GenericManaCost(mana.count()));
             }
         }
-
+        adjustedCost.setSourceFilter(previousCost.getSourceFilter());  // keep mana source restrictions
         spellAbility.getManaCostsToPay().clear();
         spellAbility.getManaCostsToPay().addAll(adjustedCost);
     }