diff --git a/Mage/src/main/java/mage/players/ManaPoolItem.java b/Mage/src/main/java/mage/players/ManaPoolItem.java
index 5b18b4d53a0..864b8764844 100644
--- a/Mage/src/main/java/mage/players/ManaPoolItem.java
+++ b/Mage/src/main/java/mage/players/ManaPoolItem.java
@@ -22,7 +22,7 @@ public class ManaPoolItem implements Serializable, Emptiable {
     private int black = 0;
     private int colorless = 0;
     private ConditionalMana conditionalMana;
-    private MageObject sourceObject;
+    private MageObject sourceObject; // source of the mana, can be null (what's use case for null values? JayDi85)
     private UUID originalId; // originalId of the mana producing ability
     private boolean flag = false;
     private Duration duration;
diff --git a/Mage/src/main/java/mage/watchers/common/ManaPaidSourceWatcher.java b/Mage/src/main/java/mage/watchers/common/ManaPaidSourceWatcher.java
index fc1fb57b282..88de5afe679 100644
--- a/Mage/src/main/java/mage/watchers/common/ManaPaidSourceWatcher.java
+++ b/Mage/src/main/java/mage/watchers/common/ManaPaidSourceWatcher.java
@@ -59,10 +59,10 @@ public class ManaPaidSourceWatcher extends Watcher {
 
         private void increment(MageObject sourceObject, ManaType manaType, Game game) {
             total++;
-            if (sourceObject.hasSubtype(SubType.TREASURE, game)) {
+            if (sourceObject != null && sourceObject.hasSubtype(SubType.TREASURE, game)) {
                 treasure++;
             }
-            if (!sourceObject.isSnow()) {
+            if (sourceObject != null && !sourceObject.isSnow()) {
                 return;
             }
             switch (manaType) {