*Corrected mana ability flagging.

*Fixed crash when using Metalworker-likes during mana payment.

src/main/java/forge/card/mana/ManaPool.java

@@ -511,9 +511,17 @@ public class ManaPool {
 
         final List<SpellAbility> paidAbs = sa.getPayingManaAbilities();
         final List<Mana> manaPaid = sa.getPayingMana();
+        
+        SpellAbility tail = ma;
+        AbilityManaPart abManaPart = null;
+        while(abManaPart == null && tail != null)
+        {
+            abManaPart = tail.getManaPart();
+            tail = tail.getSubAbility();
+        }
 
         paidAbs.add(ma); // assumes some part on the mana produced by the ability will get used
-        for (final Mana mana : ma.getManaPart().getLastProduced()) {
+        for (final Mana mana : abManaPart.getLastProduced()) {
             if (manaCost.isNeeded(mana)) {
                 manaCost.payMana(mana);
                 manaPaid.add(mana);

src/main/java/forge/card/spellability/SpellAbility.java

@@ -125,16 +125,28 @@ public abstract class SpellAbility implements ISpellAbility {
     }
 
     public final boolean isManaAbility() {
-        if(manaPart != null && isAbility())
+        SpellAbility tail = this;
+        boolean manaProducing = false;
+        if(getRestrictions() != null)
         {
-            return true;
+            if(getRestrictions().getPlaneswalker()) 
+            {
+                return false; //Loyalty ability, not a mana ability.
+            }
         }
-        if(this.getSubAbility() != null)
+        while(tail != null) {
-        {
+            if(tail.getTarget() != null) {
-            return this.getSubAbility().isManaAbility();
+                return false; //Targeted ability,not a mana ability.
+            }
+            if(tail.getManaPart() != null)
+            {
+                manaProducing = true; //Can add mana to a players mana pool, possible mana ability.
+            }            
+            
+            tail = tail.getSubAbility();
         }
         
-        return false;
+        return manaProducing;
     }
 
     public final void setManaPart(AbilityManaPart manaPart) {

src/main/java/forge/control/input/InputPayManaCostUtil.java

@@ -82,8 +82,16 @@ public class InputPayManaCostUtil {
 
         for (SpellAbility ma : card.getManaAbility()) {
             ma.setActivatingPlayer(Singletons.getControl().getPlayer());
-            AbilityManaPart m = ma.getManaPart();
+            AbilityManaPart m = null;
-            if (!ma.canPlay()) {
+            SpellAbility tail = ma;
+            while(m == null && tail != null)
+            {
+                m = tail.getManaPart();
+                tail = tail.getSubAbility();
+            }
+            if(m == null) {
+                continue;
+            } else if (!ma.canPlay()) {
                 continue;
             } else if (!InputPayManaCostUtil.canMake(ma, cneeded.toString())) {
                 continue;
@@ -191,9 +199,15 @@ public class InputPayManaCostUtil {
             }
             chosen = GuiChoose.one("Choose mana ability", abilities);
         }
+        
+        SpellAbility subchosen = chosen;
+        while(subchosen.getManaPart() == null)
+        {
+            subchosen = subchosen.getSubAbility();
+        }
 
         // save off color needed for use by any mana and reflected mana
-        chosen.getManaPart().setExpressChoice(colorsNeeded);
+        subchosen.getManaPart().setExpressChoice(colorsNeeded);
 
         Singletons.getModel().getGame().getAction().playSpellAbility(chosen);