From 878d602b58afb20c14138b9e55e9f5c860800145 Mon Sep 17 00:00:00 2001
From: Oleg Agafonov <jaydi85@gmail.com>
Date: Fri, 3 May 2019 19:10:17 +0400
Subject: [PATCH] Fixed potentional NPE error

---
 ...DragonOnTheBattlefieldWhileSpellWasCastWatcher.java | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Mage/src/main/java/mage/watchers/common/DragonOnTheBattlefieldWhileSpellWasCastWatcher.java b/Mage/src/main/java/mage/watchers/common/DragonOnTheBattlefieldWhileSpellWasCastWatcher.java
index 46266a82184..a0c6c70725a 100644
--- a/Mage/src/main/java/mage/watchers/common/DragonOnTheBattlefieldWhileSpellWasCastWatcher.java
+++ b/Mage/src/main/java/mage/watchers/common/DragonOnTheBattlefieldWhileSpellWasCastWatcher.java
@@ -42,10 +42,12 @@ public class DragonOnTheBattlefieldWhileSpellWasCastWatcher extends Watcher {
             // revealed a Dragon card or controlled a Dragon as you cast the spell
             if (spell != null) {
                 boolean revealedOrOnBattlefield = false;
-                for (Cost cost : spell.getSpellAbility().getCosts()) {
-                    if (cost instanceof RevealTargetFromHandCost) {
-                        revealedOrOnBattlefield = ((RevealTargetFromHandCost) cost).getNumberRevealedCards() > 0;
-                        break;
+                if (spell.getSpellAbility() != null) {
+                    for (Cost cost : spell.getSpellAbility().getCosts()) {
+                        if (cost instanceof RevealTargetFromHandCost) {
+                            revealedOrOnBattlefield = ((RevealTargetFromHandCost) cost).getNumberRevealedCards() > 0;
+                            break;
+                        }
                     }
                 }
                 if (!revealedOrOnBattlefield) {