diff --git a/1.5/1.5/Defs/Damage_Defs/DRM_Damages.xml b/1.5/1.5/Defs/Damage_Defs/DRM_Damages.xml
index eb4cdfd..a3df6fb 100644
--- a/1.5/1.5/Defs/Damage_Defs/DRM_Damages.xml
+++ b/1.5/1.5/Defs/Damage_Defs/DRM_Damages.xml
@@ -65,7 +65,43 @@
 	</DamageDef>
 
 	<DamageDef>
-		<defName>DRM_Frostcover</defName>
+		<defName>DRM_Damage_FrostCoverd</defName>
+		<label>frostbite</label>
+		<workerClass>DamageWorker_Frostbite</workerClass>
+		<externalViolence>false</externalViolence>
+		<deathMessage>{0} has succumbed to frostbite.</deathMessage>
+		<hediff>Frostbite</hediff>
+		<harmAllLayersUntilOutside>true</harmAllLayersUntilOutside>
+		<canUseDeflectMetalEffect>false</canUseDeflectMetalEffect>
+		<additionalHediffs>
+			<li>
+				<hediff>Hypothermia</hediff>
+				<severityPerDamageDealt>0.003</severityPerDamageDealt>
+				<inverseStatScaling>true</inverseStatScaling>
+				<victimSeverityScalingByInvBodySize>true</victimSeverityScalingByInvBodySize>
+			</li>
+			<li>
+				<hediff>DRM_CryoShock</hediff>
+				<severityPerDamageDealt>0.02</severityPerDamageDealt>
+			</li>
+			<li>
+				<hediff>DRM_Hediff_FrostCoverd</hediff>
+				<severityPerDamageDealt>0.01</severityPerDamageDealt>
+				<inverseStatScaling>true</inverseStatScaling>
+				<victimSeverityScalingByInvBodySize>true</victimSeverityScalingByInvBodySize>
+			</li>
+		</additionalHediffs>
+		<armorCategory>Heat</armorCategory>
+		<isRanged>true</isRanged>
+		<makesAnimalsFlee>true</makesAnimalsFlee>
+		<defaultDamage>3</defaultDamage>
+		<defaultArmorPenetration>0</defaultArmorPenetration>
+		<buildingDamageFactorImpassable>0</buildingDamageFactorImpassable>
+		<buildingDamageFactorPassable>0</buildingDamageFactorPassable>
+	</DamageDef>
+
+	<DamageDef>
+		<defName>DRM_Damage_FrostCoverd_after</defName>
 		<label>frostbite</label>
 		<workerClass>DamageWorker_Frostbite</workerClass>
 		<externalViolence>false</externalViolence>
diff --git a/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Damage_Effects.xml b/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Damage_Effects.xml
index 21b3cfb..93211eb 100644
--- a/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Damage_Effects.xml
+++ b/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Damage_Effects.xml
@@ -637,7 +637,7 @@
 		<comps>
 			<li Class="HediffCompProperties_DisappearsOnDeath" />
 			<li Class="HediffCompProperties_Disappears">
-				<disappearsAfterTicks>1800</disappearsAfterTicks> <!-- 30 seconds -->
+				<disappearsAfterTicks>1800</disappearsAfterTicks>				<!-- 30 seconds -->
 				<showRemainingTime>true</showRemainingTime>
 			</li>
 		</comps>
@@ -695,13 +695,177 @@
 				<severityPerDay>-4</severityPerDay>
 			</li>
 			<li Class="DragonianMix.HediffCompProperties_TimedExplosion">
-		      <damageDef>Bomb</damageDef>
-			  <soundDef>Explosion_Bomb</soundDef>
-			  <explosionRadius>2</explosionRadius>
-			  <showRemainingTime>true</showRemainingTime>
-			  <damageAmount>30</damageAmount>
-			  <armorPenetration>0.10</armorPenetration>
-			  <disappearsAfterTicks>200</disappearsAfterTicks>
+				<damageDef>Bomb</damageDef>
+				<soundDef>Explosion_Bomb</soundDef>
+				<explosionRadius>2</explosionRadius>
+				<showRemainingTime>true</showRemainingTime>
+				<damageAmount>30</damageAmount>
+				<armorPenetration>0.10</armorPenetration>
+				<disappearsAfterTicks>200</disappearsAfterTicks>
+			</li>
+			<li Class="HediffCompProperties_DisappearsOnDeath"/>
+		</comps>
+		<stages>
+			<li>
+				<label>minor</label>
+				<becomeVisible>true</becomeVisible>
+			</li>
+			<li>
+				<label>minor</label>
+				<minSeverity>0.2</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.1</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>moderate</label>
+				<minSeverity>0.35</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.2</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>serious</label>
+				<minSeverity>0.5</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.3</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>extreme</label>
+				<minSeverity>0.65</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.4</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>completely</label>
+				<minSeverity>0.85</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.5</offset>
+					</li>
+				</capMods>
+			</li>
+		</stages>
+	</HediffDef>
+
+	<HediffDef>
+		<defName>DRM_Hediff_FrostCoverd</defName>
+		<label>Frost Coverd</label>
+		<description>This preson is coverd with Frozen cloud.</description>
+		<defaultLabelColor>(1, 1, 0.8)</defaultLabelColor>
+		<hediffClass>HediffWithComps</hediffClass>
+		<comps>
+			<li Class="HediffCompProperties_SeverityPerDay">
+				<severityPerDay>-4</severityPerDay>
+			</li>
+			<li Class="DragonianMix.HediffCompProperties_TimedExplosion">
+				<damageDef>DRM_Damage_FrostCoverd</damageDef>
+				<soundDef>Explosion_Stun</soundDef>
+				<explosionRadius>3</explosionRadius>
+				<showRemainingTime>true</showRemainingTime>
+				<damageAmount>5</damageAmount>
+				<armorPenetration>0.10</armorPenetration>
+				<disappearsAfterTicks>60~120</disappearsAfterTicks>
+				<postExplosionSpawnThingDef>DRM_FrostGasCloud_Ex</postExplosionSpawnThingDef>				<!-- ARL_ToxicGasCloud -->
+				<postExplosionSpawnChance>1</postExplosionSpawnChance>
+				<postExplosionSpawnThingCount>1</postExplosionSpawnThingCount>
+			</li>
+			<li Class="HediffCompProperties_DisappearsOnDeath"/>
+		</comps>
+		<stages>
+			<li>
+				<label>minor</label>
+				<becomeVisible>true</becomeVisible>
+			</li>
+			<li>
+				<label>minor</label>
+				<minSeverity>0.2</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.1</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>moderate</label>
+				<minSeverity>0.35</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.2</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>serious</label>
+				<minSeverity>0.5</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.3</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>extreme</label>
+				<minSeverity>0.65</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.4</offset>
+					</li>
+				</capMods>
+			</li>
+			<li>
+				<label>completely</label>
+				<minSeverity>0.85</minSeverity>
+				<capMods>
+					<li>
+						<capacity>Moving</capacity>
+						<offset>-0.5</offset>
+					</li>
+				</capMods>
+			</li>
+		</stages>
+	</HediffDef>
+
+	<HediffDef>
+		<defName>DRM_Hediff_FrostCoverd_after</defName>
+		<label>Frost Coverd</label>
+		<description>This preson is coverd with Frozen cloud.</description>
+		<defaultLabelColor>(1, 1, 0.8)</defaultLabelColor>
+		<hediffClass>HediffWithComps</hediffClass>
+		<comps>
+			<li Class="HediffCompProperties_SeverityPerDay">
+				<severityPerDay>-4</severityPerDay>
+			</li>
+			<li Class="DragonianMix.HediffCompProperties_TimedExplosion">
+				<damageDef>DRM_Damage_FrostCoverd_after</damageDef>
+				<soundDef>Explosion_Stun</soundDef>
+				<explosionRadius>3</explosionRadius>
+				<showRemainingTime>true</showRemainingTime>
+				<damageAmount>5</damageAmount>
+				<armorPenetration>0.10</armorPenetration>
+				<disappearsAfterTicks>60~120</disappearsAfterTicks>
+				<postExplosionSpawnThingDef>DRM_FrostGasCloud</postExplosionSpawnThingDef>				<!-- ARL_ToxicGasCloud -->
+				<postExplosionSpawnChance>1</postExplosionSpawnChance>
+				<postExplosionSpawnThingCount>1</postExplosionSpawnThingCount>
 			</li>
 			<li Class="HediffCompProperties_DisappearsOnDeath"/>
 		</comps>
diff --git a/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Local_AddedParts.xml b/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Local_AddedParts.xml
index 226090f..404e329 100644
--- a/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Local_AddedParts.xml
+++ b/1.5/1.5/Defs/HediffDefs/DRM_Hediffs_Local_AddedParts.xml
@@ -424,7 +424,7 @@
 									<amount>15</amount>
 								</li>
 								<li>
-									<def>DRM_Frostcover</def>
+									<def>DRM_Damage_FrostCoverd</def>
 									<amount>15</amount>
 								</li>
 							</extraMeleeDamages>
diff --git a/1.5/1.5/Defs/ThingDefs/DRM_GasThing.xml b/1.5/1.5/Defs/ThingDefs/DRM_GasThing.xml
index a7c8df2..6f705c7 100644
--- a/1.5/1.5/Defs/ThingDefs/DRM_GasThing.xml
+++ b/1.5/1.5/Defs/ThingDefs/DRM_GasThing.xml
@@ -70,4 +70,59 @@
         </modExtensions>
     </ThingDef>
 
+        <!-- Gas : Thing -->
+    <ThingDef ParentName="DRM_BaseGas">
+        <defName>DRM_FrostGasCloud_Ex</defName>
+        <label>Frost cloud</label>
+        <graphicData>
+            <texPath>Things/Gas/Puff</texPath>
+            <drawSize>2.6</drawSize>
+            <color>(0.52, 1, 0.95,0.5)</color>
+        </graphicData>
+        <gas>
+            <expireSeconds>
+                <min>5</min>
+                <max>10</max>
+            </expireSeconds>
+            <!--<blockTurretTracking>true</blockTurretTracking>
+			<accuracyPenalty>0.3</accuracyPenalty>-->
+            <rotationSpeed>5</rotationSpeed>
+        </gas>
+        <thingClass>DragonianMix.OPToxicGas</thingClass>
+        <modExtensions>
+            <li Class="DragonianMix.OPToxicDefs">
+                <OPToxicHediff>DRM_Hediff_FrostCoverd_after</OPToxicHediff>                <!-- Name of HediffDef to apply, change to own HediffDef -->
+                <OPToxicSeverity>0.1</OPToxicSeverity>                <!-- Severity build up per Tick period -->
+                <OPSevUpTickPeriod>240</OPSevUpTickPeriod>                <!-- No of game ticks per each build up, recommend >= 120 -->
+            </li>
+        </modExtensions>
+    </ThingDef>
+
+    <ThingDef ParentName="DRM_BaseGas">
+        <defName>DRM_FrostGasCloud</defName>
+        <label>Frost cloud</label>
+        <graphicData>
+            <texPath>Things/Gas/Puff</texPath>
+            <drawSize>2.6</drawSize>
+            <color>(0.52, 1, 0.95,0.5)</color>
+        </graphicData>
+        <gas>
+            <expireSeconds>
+                <min>5</min>
+                <max>10</max>
+            </expireSeconds>
+            <!--<blockTurretTracking>true</blockTurretTracking>
+			<accuracyPenalty>0.3</accuracyPenalty>-->
+            <rotationSpeed>5</rotationSpeed>
+        </gas>
+        <thingClass>DragonianMix.OPToxicGas</thingClass>
+        <modExtensions>
+            <li Class="DragonianMix.OPToxicDefs">
+                <OPToxicHediff>DRM_CryoShock</OPToxicHediff>                <!-- Name of HediffDef to apply, change to own HediffDef -->
+                <OPToxicSeverity>0.1</OPToxicSeverity>                <!-- Severity build up per Tick period -->
+                <OPSevUpTickPeriod>240</OPSevUpTickPeriod>                <!-- No of game ticks per each build up, recommend >= 120 -->
+            </li>
+        </modExtensions>
+    </ThingDef>
+
 </Defs>
\ No newline at end of file
diff --git a/1.5/Bio1.5/Defs/ThingDefs/DRM_Weapon_bio.xml b/1.5/Bio1.5/Defs/ThingDefs/DRM_Weapon_bio.xml
index 76c3e66..df0dbfe 100644
--- a/1.5/Bio1.5/Defs/ThingDefs/DRM_Weapon_bio.xml
+++ b/1.5/Bio1.5/Defs/ThingDefs/DRM_Weapon_bio.xml
@@ -67,7 +67,7 @@
 			  <beamFleckChancePerTick>0.32</beamFleckChancePerTick>
 			  <beamGroundFleckDef>Fleck_BeamBurn</beamGroundFleckDef>
 			  
-			  <beamDamageDef>DRM_Frostcover</beamDamageDef>
+			  <beamDamageDef>DRM_Damage_FrostCoverd_after</beamDamageDef>
 			  <beamMoteDef>Mote_GraserBeamBase</beamMoteDef>
 			  <beamEndEffecterDef>GraserBeam_End</beamEndEffecterDef>
 			  <beamLineFleckDef>Fleck_BeamSpark</beamLineFleckDef>
@@ -102,7 +102,7 @@
 				<power>15</power>
 				<extraMeleeDamages>
 					<li>
-						<def>DRM_Frostcover</def>
+						<def>DRM_Damage_FrostCoverd</def>
 						<amount>30</amount>
 						<chance>1</chance>
 					  </li>
diff --git a/1.5/Royal1.5/Patches/DRM_Weapon_Patch_royal.xml b/1.5/Royal1.5/Patches/DRM_Weapon_Patch_royal.xml
index bd6b73c..68ddef4 100644
--- a/1.5/Royal1.5/Patches/DRM_Weapon_Patch_royal.xml
+++ b/1.5/Royal1.5/Patches/DRM_Weapon_Patch_royal.xml
@@ -31,7 +31,7 @@
 							<cooldownTime>3.35</cooldownTime>
 							<extraMeleeDamages>
 								<li>
-									<def>DRM_Frostcover</def>
+									<def>DRM_Damage_FrostCoverd</def>
 									<amount>20</amount>
 								</li>
 								<li>
@@ -39,6 +39,7 @@
 									<amount>11</amount>
 								</li>
 							</extraMeleeDamages>
+							<chanceFactor>10</chanceFactor>
 						</li>
 					</tools>
 				</value>