diff --git a/hwe/sammo/DefaultAction.php b/hwe/sammo/DefaultAction.php
index f6aec8e8..6b77c848 100644
--- a/hwe/sammo/DefaultAction.php
+++ b/hwe/sammo/DefaultAction.php
@@ -46,4 +46,8 @@ trait DefaultAction{
     public function getBattlePhaseSkillTriggerList(WarUnit $unit):?WarUnitTriggerCaller{
         return null;
     }
+
+    public function onArbitraryAction(General $general, string $actionType, ?string $phase=null, $aux=null): null|array{
+        return $aux;
+    }
 }
\ No newline at end of file
diff --git a/hwe/sammo/General.php b/hwe/sammo/General.php
index d00912ca..b5027204 100644
--- a/hwe/sammo/General.php
+++ b/hwe/sammo/General.php
@@ -1010,6 +1010,25 @@ class General implements iAction
         return $amount;
     }
 
+    public function onArbitraryAction(General $general, string $actionType, ?string $phase=null, $aux=null): null|array{
+        foreach (array_merge([
+            $this->nationType,
+            $this->officerLevelObj,
+            $this->specialDomesticObj,
+            $this->specialWarObj,
+            $this->personalityObj,
+            $this->getCrewTypeObj(),
+            $this->inheritBuffObj,
+        ], $this->itemObjs) as $iObj) {
+            if (!$iObj) {
+                continue;
+            }
+            /** @var iAction $iObj */
+            $aux = $iObj->onArbitraryAction($general, $actionType, $phase, $aux);
+        }
+        return $aux;
+    }
+
     public function getWarPowerMultiplier(WarUnit $unit): array
     {
         //xxx:$unit
diff --git a/hwe/sammo/iAction.php b/hwe/sammo/iAction.php
index d0393dec..54b5588e 100644
--- a/hwe/sammo/iAction.php
+++ b/hwe/sammo/iAction.php
@@ -18,4 +18,6 @@ interface iAction{
     public function getBattleInitSkillTriggerList(WarUnit $unit):?WarUnitTriggerCaller;
     public function getBattlePhaseSkillTriggerList(WarUnit $unit):?WarUnitTriggerCaller;
     //NOTE: getBattleEndSkillTriggerList도 필요한가?
+
+    public function onArbitraryAction(General $general, string $actionType, ?string $phase=null, ?array $aux=null): null|array;
 }
\ No newline at end of file