diff --git a/Mage.Sets/src/mage/cards/n/NighthawkScavenger.java b/Mage.Sets/src/mage/cards/n/NighthawkScavenger.java
index 421a07b3a3..857decebbb 100644
--- a/Mage.Sets/src/mage/cards/n/NighthawkScavenger.java
+++ b/Mage.Sets/src/mage/cards/n/NighthawkScavenger.java
@@ -119,7 +119,7 @@ enum NighthawkScavengerHint implements Hint {
         String message = "" + types.size();
         if (types.size() > 0) {
             message += " (";
-            message += types.stream().reduce((a, b) -> a + ", " + b);
+            message += types.stream().reduce((a, b) -> a + ", " + b).orElse("");
             message += ')';
         }
         return "Card types in opponents' graveyards: " + message;
diff --git a/Mage.Sets/src/mage/cards/t/Tarmogoyf.java b/Mage.Sets/src/mage/cards/t/Tarmogoyf.java
index ba3933ab39..3192e2c11f 100644
--- a/Mage.Sets/src/mage/cards/t/Tarmogoyf.java
+++ b/Mage.Sets/src/mage/cards/t/Tarmogoyf.java
@@ -107,7 +107,7 @@ enum TarmogoyfHint implements Hint {
         String message = "" + types.size();
         if (types.size() > 0) {
             message += " (";
-            message += types.stream().reduce((a, b) -> a + ", " + b);
+            message += types.stream().reduce((a, b) -> a + ", " + b).orElse("");
             message += ')';
         }
         return "Card types in graveyards: " + message;
diff --git a/Mage/src/main/java/mage/abilities/hint/common/DeliriumHint.java b/Mage/src/main/java/mage/abilities/hint/common/DeliriumHint.java
index baebb2d304..b94b5c7490 100644
--- a/Mage/src/main/java/mage/abilities/hint/common/DeliriumHint.java
+++ b/Mage/src/main/java/mage/abilities/hint/common/DeliriumHint.java
@@ -37,7 +37,7 @@ public enum DeliriumHint implements Hint {
         String message = "" + types.size();
         if (types.size() > 0) {
             message += " (";
-            message += types.stream().reduce((a, b) -> a + ", " + b);
+            message += types.stream().reduce((a, b) -> a + ", " + b).orElse("");
             message += ')';
         }
         return "Card types in your graveyard: " + message;