diff --git a/hwe/sammo/ActionItem/event_전투특기_견고.php b/hwe/sammo/ActionItem/event_전투특기_견고.php
new file mode 100644
index 00000000..71e0a009
--- /dev/null
+++ b/hwe/sammo/ActionItem/event_전투특기_견고.php
@@ -0,0 +1,48 @@
+<?php
+namespace sammo\ActionItem;
+
+use sammo\BaseWarUnitTrigger;
+use \sammo\General;
+use \sammo\WarUnit;
+use sammo\WarUnitTrigger\che_부상무효;
+use sammo\WarUnitTriggerCaller;
+
+class event_전투특기_견고 extends \sammo\BaseItem{
+
+    protected $id = 74;
+    protected $rawName = '비급';
+    protected $name = '비급(견고)';
+    protected $info = '[전투] 상대 필살 확률 -20%p, 상대 계략 시도시 성공 확률 -10%p, 부상 없음, 아군 피해 -10%';
+    protected $cost = 100;
+    protected $buyable = true;
+    protected $consumable = false;
+    protected $reqSecu = 3000;
+
+    public function onCalcOpposeStat(General $general, string $statName, $value, $aux = null)
+    {
+        $debuff = [
+            'warMagicSuccessProb' => 0.1,
+            'warCriticalRatio' => 0.20,
+        ][$statName] ?? 0;
+        return $value - $debuff;
+    }
+
+    public function getBattleInitSkillTriggerList(WarUnit $unit): ?WarUnitTriggerCaller
+    {
+        return new WarUnitTriggerCaller(
+            new che_부상무효($unit, BaseWarUnitTrigger::TYPE_NONE + BaseWarUnitTrigger::TYPE_DEDUP_TYPE_BASE * 404),
+        );
+    }
+
+    public function getBattlePhaseSkillTriggerList(WarUnit $unit): ?WarUnitTriggerCaller
+    {
+        return new WarUnitTriggerCaller(
+            new che_부상무효($unit, BaseWarUnitTrigger::TYPE_NONE + BaseWarUnitTrigger::TYPE_DEDUP_TYPE_BASE * 404),
+        );
+    }
+
+    public function getWarPowerMultiplier(WarUnit $unit): array
+    {
+        return [1, 0.9];
+    }
+}
\ No newline at end of file
diff --git a/hwe/scenario/scenario_2221.json b/hwe/scenario/scenario_2221.json
index 764b0c78..4a8b9281 100644
--- a/hwe/scenario/scenario_2221.json
+++ b/hwe/scenario/scenario_2221.json
@@ -14,7 +14,7 @@
         "availableSpecialWar": [
             "che_귀병", "che_신산", "che_환술", "che_집중", "che_신중", "che_반계",
             "che_보병", "che_궁병", "che_기병", "che_공성",
-            "che_돌격", "che_무쌍", "che_위압",
+            "che_돌격", "che_무쌍", "che_견고", "che_위압",
             "che_저격", "che_필살", "che_징병", "che_의술", "che_격노", "che_척사"
         ],
         "allItems": {
@@ -114,6 +114,7 @@
                 "che_계략_향낭": 0,
 
                 "event_전투특기_격노": 0,
+                "event_전투특기_견고": 0,
                 "event_전투특기_공성": 0,
                 "event_전투특기_궁병": 0,
                 "event_전투특기_귀병": 0,