From 61b06410ea2641e4e10cdbb8cff70e1e0d674ea8 Mon Sep 17 00:00:00 2001
From: Agetian <stavdev@mail.ru>
Date: Sun, 22 Jan 2017 11:14:45 +0000
Subject: [PATCH] - The AI should not try to illegally target a player in case
 it can't find any other legal target to provide (e.g. Muck Drebb + Lightning
 Bolt to the face).

---
 forge-ai/src/main/java/forge/ai/SpellAbilityAi.java          | 2 +-
 forge-ai/src/main/java/forge/ai/ability/ChangeTargetsAi.java | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/forge-ai/src/main/java/forge/ai/SpellAbilityAi.java b/forge-ai/src/main/java/forge/ai/SpellAbilityAi.java
index 6fb94d1a52c..b9139eca9f1 100644
--- a/forge-ai/src/main/java/forge/ai/SpellAbilityAi.java
+++ b/forge-ai/src/main/java/forge/ai/SpellAbilityAi.java
@@ -170,7 +170,7 @@ public abstract class SpellAbilityAi {
 
             // try to target opponent, then ally, then itself
             for (final Player p : players) {
-                if (p.canBeTargetedBy(sa)) {
+                if (p.canBeTargetedBy(sa) && sa.canTarget(p)) {
                     sa.resetTargets();
                     sa.getTargets().add(p);
                     return true;
diff --git a/forge-ai/src/main/java/forge/ai/ability/ChangeTargetsAi.java b/forge-ai/src/main/java/forge/ai/ability/ChangeTargetsAi.java
index da199d81003..2bf1f288c98 100644
--- a/forge-ai/src/main/java/forge/ai/ability/ChangeTargetsAi.java
+++ b/forge-ai/src/main/java/forge/ai/ability/ChangeTargetsAi.java
@@ -62,6 +62,10 @@ public class ChangeTargetsAi extends SpellAbilityAi {
             // don't try targeting it if we can't legally target the host card with it in the first place
             return false;
         }
+        if (!sa.canTarget(topSa)) {
+            // don't try retargeting a spell that the current card can't legally retarget (e.g. Muck Drubb + Lightning Bolt to the face)
+            return false;
+        }
         
         if (sa.getPayCosts().getCostMana() != null && sa.getPayCosts().getCostMana().getMana().hasPhyrexian()) {
             ManaCost manaCost = sa.getPayCosts().getCostMana().getMana();