No need for toUpper() here.

src/engine/powers/effectmodifiers/BlackMantleEffectModifier.java

@@ -33,7 +33,7 @@ public class BlackMantleEffectModifier extends AbstractEffectModifier {
     @Override
     public void applyBonus(AbstractCharacter ac, int trains) {
         PlayerBonuses bonus = ac.getBonuses();
-        SourceType sourceType = SourceType.valueOf(this.type.toUpperCase());
+        SourceType sourceType = SourceType.valueOf(this.type);
 
         if (sourceType == null) {
             Logger.error("Bad Source Type for " + this.type);