diff --git a/PORT-CHANGELOG.md b/PORT-CHANGELOG.md
index bca945d..3f5d22c 100644
--- a/PORT-CHANGELOG.md
+++ b/PORT-CHANGELOG.md
@@ -53,3 +53,12 @@ Dedicated-server runtime verification remains a later test step; this iteration
 - After a successful build, the script can commit and push the repository.
 - Git push retries automatically up to three times per round; after three failures the user can choose another three-attempt round or stop.
 - Added `.gitignore` for Gradle caches, build output, Loom runtime files, IDE metadata, and logs so Git integration does not stage generated files.
+
+## 0.9.0-alpha - Full-set armor effects
+
+- Attacker full set: `Better Armor` effect icon, +15 armor toughness, +0.25 knockback resistance.
+- Scout full set: `Lightweight` effect icon, +0.025 movement speed.
+- Defender full set: `Heavy Armor` effect icon, -0.02 movement speed, and final health damage reduced to 85%.
+- Medical full set: `Self-Healing Device` ready effect; below 30% health triggers Regeneration IV for 5 seconds and a 30-second self-healing cooldown.
+- Reused the original mod's mob-effect icons (`tough`, `heavy_armor`, `light_leg`, `rescue`, `rescue_cooldown`).
+- Full-set logic runs server-side so it can later be tested on a dedicated Fabric server as well as integrated singleplayer.
diff --git a/gradle.properties b/gradle.properties
index 3e4c178..2d07254 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,6 +8,6 @@ loom_version=1.17-SNAPSHOT
 fabric_api_version=0.158.0+26.2
 geckolib_version=5.5.4
 
-mod_version=0.8.0-alpha
+mod_version=0.9.0-alpha
 maven_group=me.xjqsh
 archives_base_name=lrarmor
diff --git a/src/main/java/me/xjqsh/lesraisinsarmor/LesRaisinsArmor.java b/src/main/java/me/xjqsh/lesraisinsarmor/LesRaisinsArmor.java
index 0053bf8..a8caf1c 100644
--- a/src/main/java/me/xjqsh/lesraisinsarmor/LesRaisinsArmor.java
+++ b/src/main/java/me/xjqsh/lesraisinsarmor/LesRaisinsArmor.java
@@ -1,6 +1,8 @@
 package me.xjqsh.lesraisinsarmor;
 
 import me.xjqsh.lesraisinsarmor.init.ModItems;
+import me.xjqsh.lesraisinsarmor.effect.ModEffects;
+import me.xjqsh.lesraisinsarmor.gameplay.ArmorSetEffects;
 import net.fabricmc.api.ModInitializer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -11,7 +13,9 @@ public final class LesRaisinsArmor implements ModInitializer {
 
     @Override
     public void onInitialize() {
+        ModEffects.initialize();
         ModItems.initialize();
+        ArmorSetEffects.initialize();
         LOGGER.info("LesRaisinsArmor Fabric 26.2 port initialized ({} armor pieces).", ModItems.ARMOR_ITEMS.size());
     }
 }
diff --git a/src/main/java/me/xjqsh/lesraisinsarmor/effect/ModEffects.java b/src/main/java/me/xjqsh/lesraisinsarmor/effect/ModEffects.java
new file mode 100644
index 0000000..e59584a
--- /dev/null
+++ b/src/main/java/me/xjqsh/lesraisinsarmor/effect/ModEffects.java
@@ -0,0 +1,53 @@
+package me.xjqsh.lesraisinsarmor.effect;
+
+import me.xjqsh.lesraisinsarmor.LesRaisinsArmor;
+import net.minecraft.core.Holder;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.world.effect.MobEffect;
+import net.minecraft.world.effect.MobEffectCategory;
+import net.minecraft.world.entity.ai.attributes.AttributeModifier;
+import net.minecraft.world.entity.ai.attributes.Attributes;
+
+public final class ModEffects {
+    private ModEffects() {}
+
+    public static final Holder<MobEffect> TOUGH = Registry.registerForHolder(
+            BuiltInRegistries.MOB_EFFECT, id("tough"),
+            new ArmorSetEffect(MobEffectCategory.BENEFICIAL, 0x59646f)
+                    .addAttributeModifier(Attributes.ARMOR_TOUGHNESS, id("toughness"), 15.0, AttributeModifier.Operation.ADD_VALUE)
+                    .addAttributeModifier(Attributes.KNOCKBACK_RESISTANCE, id("knockback_resistance"), 0.25, AttributeModifier.Operation.ADD_VALUE));
+
+    public static final Holder<MobEffect> LIGHT_LEG = Registry.registerForHolder(
+            BuiltInRegistries.MOB_EFFECT, id("light_leg"),
+            new ArmorSetEffect(MobEffectCategory.BENEFICIAL, 0x76c7a2)
+                    .addAttributeModifier(Attributes.MOVEMENT_SPEED, id("scout_speed"), 0.025, AttributeModifier.Operation.ADD_VALUE));
+
+    public static final Holder<MobEffect> HEAVY_ARMOR = Registry.registerForHolder(
+            BuiltInRegistries.MOB_EFFECT, id("heavy_armor"),
+            new ArmorSetEffect(MobEffectCategory.BENEFICIAL, 0x55585e)
+                    .addAttributeModifier(Attributes.MOVEMENT_SPEED, id("defender_speed"), -0.02, AttributeModifier.Operation.ADD_VALUE));
+
+    public static final Holder<MobEffect> RESCUE = Registry.registerForHolder(
+            BuiltInRegistries.MOB_EFFECT, id("rescue"),
+            new ArmorSetEffect(MobEffectCategory.BENEFICIAL, 0xb84c4c));
+
+    public static final Holder<MobEffect> RESCUE_COOLDOWN = Registry.registerForHolder(
+            BuiltInRegistries.MOB_EFFECT, id("rescue_cooldown"),
+            new ArmorSetEffect(MobEffectCategory.NEUTRAL, 0x6f6f6f));
+
+    private static Identifier id(String path) {
+        return Identifier.fromNamespaceAndPath(LesRaisinsArmor.MOD_ID, path);
+    }
+
+    public static void initialize() {
+        // Class loading performs registry registration.
+    }
+
+    private static final class ArmorSetEffect extends MobEffect {
+        private ArmorSetEffect(MobEffectCategory category, int color) {
+            super(category, color);
+        }
+    }
+}
diff --git a/src/main/java/me/xjqsh/lesraisinsarmor/gameplay/ArmorSetEffects.java b/src/main/java/me/xjqsh/lesraisinsarmor/gameplay/ArmorSetEffects.java
new file mode 100644
index 0000000..b6f8bc4
--- /dev/null
+++ b/src/main/java/me/xjqsh/lesraisinsarmor/gameplay/ArmorSetEffects.java
@@ -0,0 +1,81 @@
+package me.xjqsh.lesraisinsarmor.gameplay;
+
+import me.xjqsh.lesraisinsarmor.effect.ModEffects;
+import me.xjqsh.lesraisinsarmor.item.LrArmorItem;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.effect.MobEffect;
+import net.minecraft.world.effect.MobEffectInstance;
+import net.minecraft.world.effect.MobEffects;
+import net.minecraft.world.entity.EquipmentSlot;
+import net.minecraft.world.item.ItemStack;
+
+public final class ArmorSetEffects {
+    private static final int SET_EFFECT_DURATION = 40;
+    private static final int REFRESH_THRESHOLD = 25;
+    private static final int RESCUE_COOLDOWN_TICKS = 30 * 20;
+    private static final int RESCUE_REGEN_TICKS = 5 * 20;
+
+    private ArmorSetEffects() {}
+
+    public static void initialize() {
+        ServerTickEvents.END_SERVER_TICK.register(server -> {
+            for (ServerPlayer player : server.getPlayerList().getPlayers()) {
+                tickPlayer(player);
+            }
+        });
+    }
+
+    private static void tickPlayer(ServerPlayer player) {
+        syncSetEffect(player, "attacker", ModEffects.TOUGH);
+        syncSetEffect(player, "scout", ModEffects.LIGHT_LEG);
+        syncSetEffect(player, "defender", ModEffects.HEAVY_ARMOR);
+
+        if (hasFullSet(player, "medical")) {
+            tickMedical(player);
+        } else {
+            player.removeEffect(ModEffects.RESCUE);
+        }
+    }
+
+    private static void tickMedical(ServerPlayer player) {
+        if (player.hasEffect(ModEffects.RESCUE_COOLDOWN)) {
+            player.removeEffect(ModEffects.RESCUE);
+            return;
+        }
+
+        refreshEffect(player, ModEffects.RESCUE);
+
+        if (player.getHealth() < player.getMaxHealth() * 0.30f) {
+            player.removeEffect(ModEffects.RESCUE);
+            player.addEffect(new MobEffectInstance(MobEffects.REGENERATION, RESCUE_REGEN_TICKS, 3, false, true, true));
+            player.addEffect(new MobEffectInstance(ModEffects.RESCUE_COOLDOWN, RESCUE_COOLDOWN_TICKS, 0, false, false, true));
+        }
+    }
+
+    private static void syncSetEffect(ServerPlayer player, String suit, net.minecraft.core.Holder<MobEffect> effect) {
+        if (hasFullSet(player, suit)) {
+            refreshEffect(player, effect);
+        } else {
+            player.removeEffect(effect);
+        }
+    }
+
+    private static void refreshEffect(ServerPlayer player, net.minecraft.core.Holder<MobEffect> effect) {
+        MobEffectInstance current = player.getEffect(effect);
+        if (current == null || current.getDuration() < REFRESH_THRESHOLD) {
+            player.addEffect(new MobEffectInstance(effect, SET_EFFECT_DURATION, 0, false, false, true));
+        }
+    }
+
+    public static boolean hasFullSet(net.minecraft.world.entity.LivingEntity entity, String suit) {
+        return isSuitPiece(entity.getItemBySlot(EquipmentSlot.HEAD), suit)
+                && isSuitPiece(entity.getItemBySlot(EquipmentSlot.CHEST), suit)
+                && isSuitPiece(entity.getItemBySlot(EquipmentSlot.LEGS), suit)
+                && isSuitPiece(entity.getItemBySlot(EquipmentSlot.FEET), suit);
+    }
+
+    private static boolean isSuitPiece(ItemStack stack, String suit) {
+        return stack.getItem() instanceof LrArmorItem armor && armor.suitId().equals(suit);
+    }
+}
diff --git a/src/main/java/me/xjqsh/lesraisinsarmor/mixin/LivingEntityDamageMixin.java b/src/main/java/me/xjqsh/lesraisinsarmor/mixin/LivingEntityDamageMixin.java
new file mode 100644
index 0000000..6f5754a
--- /dev/null
+++ b/src/main/java/me/xjqsh/lesraisinsarmor/mixin/LivingEntityDamageMixin.java
@@ -0,0 +1,26 @@
+package me.xjqsh.lesraisinsarmor.mixin;
+
+import me.xjqsh.lesraisinsarmor.gameplay.ArmorSetEffects;
+import net.minecraft.world.entity.LivingEntity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyArg;
+
+@Mixin(LivingEntity.class)
+public abstract class LivingEntityDamageMixin {
+    @ModifyArg(
+            method = "actuallyHurt",
+            at = @At(value = "INVOKE", target = "Lnet/minecraft/world/entity/LivingEntity;setHealth(F)V"),
+            index = 0
+    )
+    private float lrarmor$applyDefenderDamageReduction(float newHealth) {
+        LivingEntity self = (LivingEntity) (Object) this;
+        if (!ArmorSetEffects.hasFullSet(self, "defender")) {
+            return newHealth;
+        }
+
+        float currentHealth = self.getHealth();
+        float healthDamage = Math.max(0.0f, currentHealth - newHealth);
+        return currentHealth - healthDamage * 0.85f;
+    }
+}
diff --git a/src/main/resources/assets/lrarmor/lang/en_us.json b/src/main/resources/assets/lrarmor/lang/en_us.json
index aa4cdba..0eac947 100644
--- a/src/main/resources/assets/lrarmor/lang/en_us.json
+++ b/src/main/resources/assets/lrarmor/lang/en_us.json
@@ -28,7 +28,6 @@
     "item.lrarmor.medical_chestplate": "MEDICAL-CHEST",
     "item.lrarmor.medical_leggings": "MEDICAL-LEGS",
     "item.lrarmor.medical_boots": "MEDICAL-BOOTS",
-    
     "item.lrarmor.dea_armed_helmet": "Black Tactical Helmet",
     "item.lrarmor.dea_armed_chestplate": "DEA Chest",
     "item.lrarmor.dea_armed_leggings": "Denim Jeans",
@@ -65,7 +64,6 @@
     "item.lrarmor.joker_chestplate": "\"Joker\" Jacket",
     "item.lrarmor.joker_leggings": "\"Joker\" Pants",
     "item.lrarmor.joker_boots": "\"Joker\" Boots",
-
     "suit.lrarmor.armored_chemical": "ARMORED CHEMICAL SUIT",
     "suit.lrarmor.attacker": "ATTACKER SUIT",
     "suit.lrarmor.chemical_protective": "CHEMICAL PROTECTIVE SUIT",
@@ -82,10 +80,10 @@
     "suit.lrarmor.fbi_armed": "FBI Special Suit",
     "suit.lrarmor.joker": "\"Joker\" Organization Suit",
     "suit.lrarmor.joker_armed": "\"Joker\" Organization Combat Suit",
-
     "effect.lrarmor.tough": "Better Armor",
     "effect.lrarmor.heavy_armor": "Heavy Armor",
     "effect.lrarmor.light_leg": "Lightweight",
     "effect.lrarmor.rescue": "Self-Healing Device",
-    "tooltip.lramrmor.suit": "%s: %s"
+    "tooltip.lramrmor.suit": "%s: %s",
+    "effect.lrarmor.rescue_cooldown": "Self-Healing Cooldown"
 }
diff --git a/src/main/resources/assets/lrarmor/lang/zh_cn.json b/src/main/resources/assets/lrarmor/lang/zh_cn.json
index 42b9422..57d6fc3 100644
--- a/src/main/resources/assets/lrarmor/lang/zh_cn.json
+++ b/src/main/resources/assets/lrarmor/lang/zh_cn.json
@@ -1,4 +1,4 @@
-    {
+{
     "itemGroup.tab.lrarmor": "绿葡萄护甲",
     "item.lrarmor.armored_chemical_helmet": "装甲防化服-头盔",
     "item.lrarmor.armored_chemical_chestplate": "装甲防化服-胸甲",
@@ -28,7 +28,6 @@
     "item.lrarmor.medical_chestplate": "创伤小组-胸甲",
     "item.lrarmor.medical_leggings": "创伤小组-护腿",
     "item.lrarmor.medical_boots": "创伤小组-靴子",
-    
     "item.lrarmor.dea_armed_helmet": "黑色战术头盔",
     "item.lrarmor.dea_armed_chestplate": "DEA 防弹衣",
     "item.lrarmor.dea_armed_leggings": "休闲牛仔裤",
@@ -65,7 +64,6 @@
     "item.lrarmor.joker_chestplate": "“愚者”礼服上衣",
     "item.lrarmor.joker_leggings": "“愚者”礼服长裤",
     "item.lrarmor.joker_boots": "“愚者”礼服靴子",
-
     "suit.lrarmor.armored_chemical": "装甲防化服套装",
     "suit.lrarmor.attacker": "突击者套装",
     "suit.lrarmor.chemical_protective": "防化服套装",
@@ -82,10 +80,10 @@
     "suit.lrarmor.fbi_armed": "FBI特别组装甲套装",
     "suit.lrarmor.joker": "“愚者”组织套装",
     "suit.lrarmor.joker_armed": "“愚者”组织作战套装",
-
     "effect.lrarmor.tough": "特制减震夹层",
     "effect.lrarmor.heavy_armor": "超重型全身装甲",
     "effect.lrarmor.light_leg": "轻量化腿部支撑",
     "effect.lrarmor.rescue": "便携自愈设备",
-    "tooltip.lramrmor.suit": "%s: %s"
-}
\ No newline at end of file
+    "tooltip.lramrmor.suit": "%s: %s",
+    "effect.lrarmor.rescue_cooldown": "自愈装置冷却"
+}
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index 0466b9a..56dc20d 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -25,6 +25,7 @@
     "geckolib": ">=5.5.4"
   },
   "mixins": [
+    "lrarmor.mixins.json",
     {
       "config": "lrarmor.client.mixins.json",
       "environment": "client"
diff --git a/src/main/resources/lrarmor.mixins.json b/src/main/resources/lrarmor.mixins.json
new file mode 100644
index 0000000..7bd0907
--- /dev/null
+++ b/src/main/resources/lrarmor.mixins.json
@@ -0,0 +1,10 @@
+{
+  "required": true,
+  "package": "me.xjqsh.lesraisinsarmor.mixin",
+  "mixins": [
+    "LivingEntityDamageMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}