From 513085bbcc851bbb2e0803e58b7fcc80dd81f31e Mon Sep 17 00:00:00 2001
From: Alex Vasile <48962821+Alex-Vasile@users.noreply.github.com>
Date: Sun, 17 Jul 2022 21:08:09 -0400
Subject: [PATCH] Fixed Banishing Light-type effects to not exile creatures if
 the source permanent is not on the battlefield when the effect resolves.
 Closes #8899.

---
 .../src/mage/cards/l/LagrellaTheMagpie.java   |  5 +++++
 .../common/ExileUntilSourceLeavesEffect.java  | 20 ++++++++++++-------
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/Mage.Sets/src/mage/cards/l/LagrellaTheMagpie.java b/Mage.Sets/src/mage/cards/l/LagrellaTheMagpie.java
index 20de8227915..1a9c3627e7d 100644
--- a/Mage.Sets/src/mage/cards/l/LagrellaTheMagpie.java
+++ b/Mage.Sets/src/mage/cards/l/LagrellaTheMagpie.java
@@ -87,6 +87,11 @@ class LagrellaTheMagpieEffect extends OneShotEffect {
         if (player == null) {
             return false;
         }
+        // Like other Banishing Light effects, no permanents get exiled if Lagrella is not in the battlefield when this ability resolves.
+        if (game.getPermanent(source.getSourceId()) == null) {
+            return false;
+        }
+
         Cards cards = new CardsImpl();
         this.getTargetPointer()
                 .getTargets(game, source)
diff --git a/Mage/src/main/java/mage/abilities/effects/common/ExileUntilSourceLeavesEffect.java b/Mage/src/main/java/mage/abilities/effects/common/ExileUntilSourceLeavesEffect.java
index fb0acb195fe..d3c84642fe3 100644
--- a/Mage/src/main/java/mage/abilities/effects/common/ExileUntilSourceLeavesEffect.java
+++ b/Mage/src/main/java/mage/abilities/effects/common/ExileUntilSourceLeavesEffect.java
@@ -30,13 +30,19 @@ public class ExileUntilSourceLeavesEffect extends OneShotEffect {
     @Override
     public boolean apply(Game game, Ability source) {
         Permanent permanent = game.getPermanent(source.getSourceId());
-        if (permanent != null) {
-            ExileTargetEffect effect = new ExileTargetEffect(CardUtil.getCardExileZoneId(game, source), permanent.getIdName());
-            if (targetPointer != null) {  // Grasping Giant
-                effect.setTargetPointer(targetPointer);
-            }
-            return effect.apply(game, source);
+        if (permanent == null) {
+            return false;
         }
-        return false;
+        // If Banishing Light leaves the battlefield before its triggered ability resolves, the target permanent won't be exiled.
+        // (2021-03-19)
+        if (game.getPermanent(source.getSourceId()) == null) {
+            return false;
+        }
+
+        ExileTargetEffect effect = new ExileTargetEffect(CardUtil.getCardExileZoneId(game, source), permanent.getIdName());
+        if (targetPointer != null) {  // Grasping Giant
+            effect.setTargetPointer(targetPointer);
+        }
+        return effect.apply(game, source);
     }
 }