- Fixed Lightmine Field.

src/main/java/forge/card/abilityfactory/AbilityFactory.java

@@ -1021,6 +1021,7 @@ public class AbilityFactory {
                 if (o instanceof List<?>) {
                     @SuppressWarnings("unchecked")
                     final List<Player> pList = (List<Player>) o;
+                    if (!pList.isEmpty() && pList.get(0) instanceof Player) {
                         for (final Player p : pList) {
                             if (!players.contains(p)) {
                                 players.add(p);
@@ -1028,6 +1029,7 @@ public class AbilityFactory {
                         }
                     }
                 }
+            }
         } else if (defined.startsWith("Replaced")) {
             final SpellAbility root = sa.getRootAbility();
             Object o = null;