From 30af2883188a6226003f77d342e6a1fdcf79e07b Mon Sep 17 00:00:00 2001
From: tool4ever <therealtoolkit@hotmail.com>
Date: Thu, 5 Sep 2024 15:34:17 +0200
Subject: [PATCH] Fix transformed backside cast failing when some AltCost apply
 (#6070)

---
 .../main/java/forge/game/card/CardFactoryUtil.java    | 11 +++--------
 .../src/main/java/forge/game/card/CardState.java      | 10 ++++++++++
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/forge-game/src/main/java/forge/game/card/CardFactoryUtil.java b/forge-game/src/main/java/forge/game/card/CardFactoryUtil.java
index fe76d4adcd2..806a9a174e9 100644
--- a/forge-game/src/main/java/forge/game/card/CardFactoryUtil.java
+++ b/forge-game/src/main/java/forge/game/card/CardFactoryUtil.java
@@ -2821,12 +2821,7 @@ public class CardFactoryUtil {
             final String[] k = keyword.split(":");
             final Cost disturbCost = new Cost(k[1], true);
 
-            SpellAbility newSA;
-            if (host.getAlternateState().getType().hasSubtype("Aura")) {
-                newSA = host.getAlternateState().getFirstAbility().copyWithDefinedCost(disturbCost);
-            } else {
-                newSA = new SpellPermanent(host, host.getAlternateState(), disturbCost);
-            }
+            SpellAbility newSA = host.getAlternateState().getFirstSpellAbilityWithFallback().copyWithDefinedCost(disturbCost);
             newSA.setCardState(host.getAlternateState());
 
             StringBuilder sbCost = new StringBuilder("Disturb");
@@ -3137,7 +3132,7 @@ public class CardFactoryUtil {
         } else if (keyword.startsWith("Freerunning")) {
             final String[] k = keyword.split(":");
             final Cost freerunningCost = new Cost(k[1], false);
-            final SpellAbility newSA = card.getFirstSpellAbility().copyWithDefinedCost(freerunningCost);
+            final SpellAbility newSA = card.getFirstSpellAbilityWithFallback().copyWithDefinedCost(freerunningCost);
 
             if (host.isInstant() || host.isSorcery()) {
                 newSA.putParam("Secondary", "True");
@@ -3463,7 +3458,7 @@ public class CardFactoryUtil {
         } else if (keyword.startsWith("Prowl")) {
             final String[] k = keyword.split(":");
             final Cost prowlCost = new Cost(k[1], false);
-            final SpellAbility newSA = card.getFirstSpellAbility().copyWithDefinedCost(prowlCost);
+            final SpellAbility newSA = card.getFirstSpellAbilityWithFallback().copyWithDefinedCost(prowlCost);
 
             if (host.isInstant() || host.isSorcery()) {
                 newSA.putParam("Secondary", "True");
diff --git a/forge-game/src/main/java/forge/game/card/CardState.java b/forge-game/src/main/java/forge/game/card/CardState.java
index 0cfb70e1a66..c6060bdbc7b 100644
--- a/forge-game/src/main/java/forge/game/card/CardState.java
+++ b/forge-game/src/main/java/forge/game/card/CardState.java
@@ -45,6 +45,7 @@ import forge.game.player.Player;
 import forge.game.replacement.ReplacementEffect;
 import forge.game.spellability.SpellAbility;
 import forge.game.spellability.SpellAbilityPredicates;
+import forge.game.spellability.SpellPermanent;
 import forge.game.staticability.StaticAbility;
 import forge.game.trigger.Trigger;
 import forge.util.ITranslatable;
@@ -377,6 +378,15 @@ public class CardState extends GameObject implements IHasSVars, ITranslatable {
         return Iterables.getFirst(getNonManaAbilities(), null);
     }
 
+    public final SpellAbility getFirstSpellAbilityWithFallback() {
+        SpellAbility sa = getFirstSpellAbility();
+        if (sa != null || getTypeWithChanges().isLand()) {
+            return sa;
+        }
+        // this happens if it's transformed backside (e.g. Disturbed)
+        return new SpellPermanent(getCard(), this);
+    }
+
     public final boolean hasSpellAbility(final SpellAbility sa) {
         return getSpellAbilities().contains(sa);
     }