diff --git a/lib/src/core/engine/act_progression_service.dart b/lib/src/core/engine/act_progression_service.dart
index 92b7113..6f0f332 100644
--- a/lib/src/core/engine/act_progression_service.dart
+++ b/lib/src/core/engine/act_progression_service.dart
@@ -187,6 +187,7 @@ class ActProgressionService {
       level: bossLevel,
       atk: (bossStats.atk * 1.5).round(), // Boss 보정 (1.5배)
       def: (bossStats.def * 1.5).round(),
+      magDef: (bossStats.def * 1.8).round(), // 보스 마법 방어 (물리 대비 1.2배)
       hpMax: (bossStats.hp * 2.0).round(), // HP는 2.0배 (보스다운 전투 시간)
       hpCurrent: (bossStats.hp * 2.0).round(),
       criRate: 0.05,
diff --git a/lib/src/core/engine/progress_service.dart b/lib/src/core/engine/progress_service.dart
index b23eec5..259cf8f 100644
--- a/lib/src/core/engine/progress_service.dart
+++ b/lib/src/core/engine/progress_service.dart
@@ -970,6 +970,8 @@ class ProgressService {
     // 보스전 사망이 아닐 경우에만 장비 손실
     var newEquipment = state.equipment;
     var lostCount = 0;
+    String? lostItemName;
+    EquipmentSlot? lostItemSlot;
 
     if (!isBossDeath) {
       // 무기(슬롯 0)를 제외한 장착된 장비 중 1개를 제물로 삭제
@@ -987,12 +989,16 @@ class ProgressService {
             equippedNonWeaponSlots[state.rng.nextInt(
               equippedNonWeaponSlots.length,
             )];
-        final slot = EquipmentSlot.values[sacrificeIndex];
+
+        // 제물로 바칠 아이템 정보 저장
+        final lostItem = state.equipment.getItemByIndex(sacrificeIndex);
+        lostItemName = lostItem.name;
+        lostItemSlot = EquipmentSlot.values[sacrificeIndex];
 
         // 해당 슬롯을 빈 장비로 교체
         newEquipment = newEquipment.setItemByIndex(
           sacrificeIndex,
-          EquipmentItem.empty(slot),
+          EquipmentItem.empty(lostItemSlot),
         );
       }
     }
@@ -1002,6 +1008,8 @@ class ProgressService {
       cause: cause,
       killerName: killerName,
       lostEquipmentCount: lostCount,
+      lostItemName: lostItemName,
+      lostItemSlot: lostItemSlot,
       goldAtDeath: state.inventory.gold,
       levelAtDeath: state.traits.level,
       timestamp: state.skillSystem.elapsedMs,
diff --git a/lib/src/features/game/widgets/death_overlay.dart b/lib/src/features/game/widgets/death_overlay.dart
index 81c06c8..24dd28b 100644
--- a/lib/src/features/game/widgets/death_overlay.dart
+++ b/lib/src/features/game/widgets/death_overlay.dart
@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:asciineverdie/data/game_text_l10n.dart' as l10n;
 import 'package:asciineverdie/src/core/l10n/game_data_l10n.dart';
 import 'package:asciineverdie/src/core/model/combat_event.dart';
+import 'package:asciineverdie/src/core/model/equipment_slot.dart';
 import 'package:asciineverdie/src/core/model/game_state.dart';
 import 'package:asciineverdie/src/shared/retro_colors.dart';
 
@@ -293,6 +294,11 @@ class DeathOverlay extends StatelessWidget {
     final expColor = RetroColors.expOf(context);
     final gold = RetroColors.goldOf(context);
 
+    // 슬롯명 + 아이템명 조합
+    final lostItemDisplay = hasLostItem
+        ? '[${_getSlotName(deathInfo.lostItemSlot)}] ${deathInfo.lostItemName}'
+        : null;
+
     return Column(
       children: [
         // 제물로 바친 아이템 표시
@@ -321,10 +327,10 @@ class DeathOverlay extends StatelessWidget {
                       ),
                       const SizedBox(height: 4),
                       Text(
-                        deathInfo.lostItemName!,
+                        lostItemDisplay!,
                         style: TextStyle(
                           fontFamily: 'PressStart2P',
-                          fontSize: 14,
+                          fontSize: 13,
                           color: hpColor,
                         ),
                       ),
@@ -671,4 +677,22 @@ class DeathOverlay extends StatelessWidget {
       ),
     };
   }
+
+  /// 장비 슬롯 이름 반환
+  String _getSlotName(EquipmentSlot? slot) {
+    if (slot == null) return '';
+    return switch (slot) {
+      EquipmentSlot.weapon => l10n.slotWeapon,
+      EquipmentSlot.shield => l10n.slotShield,
+      EquipmentSlot.helm => l10n.slotHelm,
+      EquipmentSlot.hauberk => l10n.slotHauberk,
+      EquipmentSlot.brassairts => l10n.slotBrassairts,
+      EquipmentSlot.vambraces => l10n.slotVambraces,
+      EquipmentSlot.gauntlets => l10n.slotGauntlets,
+      EquipmentSlot.gambeson => l10n.slotGambeson,
+      EquipmentSlot.cuisses => l10n.slotCuisses,
+      EquipmentSlot.greaves => l10n.slotGreaves,
+      EquipmentSlot.sollerets => l10n.slotSollerets,
+    };
+  }
 }
diff --git a/test/core/engine/progress_loop_test.dart b/test/core/engine/progress_loop_test.dart
index 08212f0..03d6f30 100644
--- a/test/core/engine/progress_loop_test.dart
+++ b/test/core/engine/progress_loop_test.dart
@@ -23,6 +23,7 @@ void main() {
       level: 1,
       atk: 10,
       def: 5,
+      magDef: 5,
       hpMax: 50,
       hpCurrent: 0, // 몬스터 사망
       criRate: 0.05,
diff --git a/test/core/engine/progress_service_test.dart b/test/core/engine/progress_service_test.dart
index 8f0672d..48429b6 100644
--- a/test/core/engine/progress_service_test.dart
+++ b/test/core/engine/progress_service_test.dart
@@ -74,6 +74,7 @@ void main() {
       level: 10,
       atk: 10,
       def: 5,
+      magDef: 5,
       hpMax: 100,
       hpCurrent: 0, // 몬스터 사망 상태
       criRate: 0.05,