From 9ecad3f775753eaaf3e49f5ca75884daada456d7 Mon Sep 17 00:00:00 2001
From: Adam Pantel <>
Date: Tue, 16 Feb 2021 15:14:10 -0500
Subject: [PATCH] Prevent crash with Back for More

---
 forge-ai/src/main/java/forge/ai/ability/FightAi.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/forge-ai/src/main/java/forge/ai/ability/FightAi.java b/forge-ai/src/main/java/forge/ai/ability/FightAi.java
index 714376bb3a8..942579582f1 100644
--- a/forge-ai/src/main/java/forge/ai/ability/FightAi.java
+++ b/forge-ai/src/main/java/forge/ai/ability/FightAi.java
@@ -51,7 +51,11 @@ public class FightAi extends SpellAbilityAi {
 
         // assumes the triggered card belongs to the ai
         if (sa.hasParam("Defined")) {
-            Card fighter1 = AbilityUtils.getDefinedCards(source, sa.getParam("Defined"), sa).get(0);
+            CardCollection fighter1List = AbilityUtils.getDefinedCards(source, sa.getParam("Defined"), sa);
+            if (fighter1List.isEmpty()) {
+                return true;
+            }
+            Card fighter1 = fighter1List.get(0);
             for (Card humanCreature : humCreatures) {
                 if (ComputerUtilCombat.getDamageToKill(humanCreature) <= fighter1.getNetPower()
                         && humanCreature.getNetPower() < ComputerUtilCombat.getDamageToKill(fighter1)) {