- [C17] Added Path of Ancestry.

- Fixed Command Tower and Path of Ancestry generating 2 colorless mana in non-EDH matches.

forge-game/src/main/java/forge/game/ability/effects/ManaEffect.java

@@ -62,7 +62,7 @@ public class ManaEffect extends SpellAbilityEffect {
                     Player activator = sa.getActivatingPlayer();
                     String express = abMana.getExpressChoice();
                     String[] colorsProduced = abMana.getComboColors().split(" ");
-                    
+
                     final StringBuilder choiceString = new StringBuilder();
                     ColorSet colorOptions = null;
                     String[] colorsNeeded = express.isEmpty() ? null : express.split(" ");
@@ -94,6 +94,12 @@ public class ManaEffect extends SpellAbilityEffect {
                         }
                         choiceString.append(choice);
                     }
+
+                    if ("".equals(choiceString.toString()) && "Combo ColorIdentity".equals(abMana.getOrigProduced())) {
+                        // No mana could be produced here (non-EDH match?), so cut short
+                        return;
+                    }
+
                     game.action.nofityOfValue(sa, card, activator + " picked " + choiceString, activator);
                     abMana.setExpressChoice(choiceString.toString());
                 }

forge-game/src/main/java/forge/game/card/Card.java

@@ -4565,6 +4565,14 @@ public class Card extends GameEntity implements Comparable<Card> {
                             return false;
                         }
                         break;
+                    case "Commander":
+                        final List<Card> cmdrs = sourceController.getCommanders();
+                        for (Card cmdr : cmdrs) {
+                            if (sharesCreatureTypeWith(cmdr)) {
+                                return true;
+                            }
+                        }
+                        return false;
                     case "Enchanted":
                         for (final SpellAbility sa : source.currentState.getNonManaAbilities()) {
                             final SpellAbility root = sa.getRootAbility();