From c061c7f4364d7610c08c1ffa05d6a065478eba0a Mon Sep 17 00:00:00 2001
From: Oleg Agafonov <jaydi85@gmail.com>
Date: Wed, 19 Apr 2023 18:34:52 +0400
Subject: [PATCH] [CLB] Undercity Dungeon - fixed game error (NPE fix)

---
 .../java/mage/game/command/dungeons/UndercityDungeon.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Mage/src/main/java/mage/game/command/dungeons/UndercityDungeon.java b/Mage/src/main/java/mage/game/command/dungeons/UndercityDungeon.java
index 611044d008c..e39361dbc28 100644
--- a/Mage/src/main/java/mage/game/command/dungeons/UndercityDungeon.java
+++ b/Mage/src/main/java/mage/game/command/dungeons/UndercityDungeon.java
@@ -159,9 +159,11 @@ class ThroneOfTheDeadThreeEffect extends OneShotEffect {
         if (card != null) {
             player.moveCards(card, Zone.BATTLEFIELD, source, game);
             Permanent permanent = game.getPermanent(card.getId());
-            permanent.addCounters(CounterType.P1P1.createInstance(3), source, game);
-            game.addEffect(new GainAbilityTargetEffect(HexproofAbility.getInstance(), Duration.UntilYourNextTurn)
-                    .setTargetPointer(new FixedTarget(permanent, game)), source);
+            if (permanent != null) {
+                permanent.addCounters(CounterType.P1P1.createInstance(3), source, game);
+                game.addEffect(new GainAbilityTargetEffect(HexproofAbility.getInstance(), Duration.UntilYourNextTurn)
+                        .setTargetPointer(new FixedTarget(permanent, game)), source);
+            }
         }
         player.shuffleLibrary(source, game);
         return true;