diff --git a/L2J_Mobius_1.0_Ertheia/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java b/L2J_Mobius_1.0_Ertheia/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
index d7b9ce84d2..338341bd5e 100644
--- a/L2J_Mobius_1.0_Ertheia/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
+++ b/L2J_Mobius_1.0_Ertheia/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
@@ -28,6 +28,7 @@ import com.l2jmobius.gameserver.data.xml.impl.SkillData;
 import com.l2jmobius.gameserver.data.xml.impl.SkillTreesData;
 import com.l2jmobius.gameserver.model.L2SkillLearn;
 import com.l2jmobius.gameserver.model.actor.instance.L2PcInstance;
+import com.l2jmobius.gameserver.model.ceremonyofchaos.CeremonyOfChaosEvent;
 import com.l2jmobius.gameserver.model.holders.SkillHolder;
 import com.l2jmobius.gameserver.model.skills.Skill;
 import com.l2jmobius.gameserver.network.L2GameClient;
@@ -94,7 +95,7 @@ public class RequestAcquireAbilityList implements IClientIncomingPacket
 			activeChar.sendPacket(SystemMessageId.ABILITIES_CAN_BE_USED_BY_NOBLESSE_EXALTED_LV_99_OR_ABOVE);
 			return;
 		}
-		else if (activeChar.isInOlympiadMode()) // TODO: Add Ceremony of Chaos when done.
+		else if (activeChar.isInOlympiadMode() || activeChar.isOnEvent(CeremonyOfChaosEvent.class))
 		{
 			activeChar.sendPacket(SystemMessageId.YOU_CANNOT_USE_OR_RESET_ABILITY_POINTS_WHILE_PARTICIPATING_IN_THE_OLYMPIAD_OR_CEREMONY_OF_CHAOS);
 			return;
diff --git a/L2J_Mobius_2.5_Underground/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java b/L2J_Mobius_2.5_Underground/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
index d7b9ce84d2..338341bd5e 100644
--- a/L2J_Mobius_2.5_Underground/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
+++ b/L2J_Mobius_2.5_Underground/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
@@ -28,6 +28,7 @@ import com.l2jmobius.gameserver.data.xml.impl.SkillData;
 import com.l2jmobius.gameserver.data.xml.impl.SkillTreesData;
 import com.l2jmobius.gameserver.model.L2SkillLearn;
 import com.l2jmobius.gameserver.model.actor.instance.L2PcInstance;
+import com.l2jmobius.gameserver.model.ceremonyofchaos.CeremonyOfChaosEvent;
 import com.l2jmobius.gameserver.model.holders.SkillHolder;
 import com.l2jmobius.gameserver.model.skills.Skill;
 import com.l2jmobius.gameserver.network.L2GameClient;
@@ -94,7 +95,7 @@ public class RequestAcquireAbilityList implements IClientIncomingPacket
 			activeChar.sendPacket(SystemMessageId.ABILITIES_CAN_BE_USED_BY_NOBLESSE_EXALTED_LV_99_OR_ABOVE);
 			return;
 		}
-		else if (activeChar.isInOlympiadMode()) // TODO: Add Ceremony of Chaos when done.
+		else if (activeChar.isInOlympiadMode() || activeChar.isOnEvent(CeremonyOfChaosEvent.class))
 		{
 			activeChar.sendPacket(SystemMessageId.YOU_CANNOT_USE_OR_RESET_ABILITY_POINTS_WHILE_PARTICIPATING_IN_THE_OLYMPIAD_OR_CEREMONY_OF_CHAOS);
 			return;
diff --git a/L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java b/L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
index d7b9ce84d2..338341bd5e 100644
--- a/L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
+++ b/L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
@@ -28,6 +28,7 @@ import com.l2jmobius.gameserver.data.xml.impl.SkillData;
 import com.l2jmobius.gameserver.data.xml.impl.SkillTreesData;
 import com.l2jmobius.gameserver.model.L2SkillLearn;
 import com.l2jmobius.gameserver.model.actor.instance.L2PcInstance;
+import com.l2jmobius.gameserver.model.ceremonyofchaos.CeremonyOfChaosEvent;
 import com.l2jmobius.gameserver.model.holders.SkillHolder;
 import com.l2jmobius.gameserver.model.skills.Skill;
 import com.l2jmobius.gameserver.network.L2GameClient;
@@ -94,7 +95,7 @@ public class RequestAcquireAbilityList implements IClientIncomingPacket
 			activeChar.sendPacket(SystemMessageId.ABILITIES_CAN_BE_USED_BY_NOBLESSE_EXALTED_LV_99_OR_ABOVE);
 			return;
 		}
-		else if (activeChar.isInOlympiadMode()) // TODO: Add Ceremony of Chaos when done.
+		else if (activeChar.isInOlympiadMode() || activeChar.isOnEvent(CeremonyOfChaosEvent.class))
 		{
 			activeChar.sendPacket(SystemMessageId.YOU_CANNOT_USE_OR_RESET_ABILITY_POINTS_WHILE_PARTICIPATING_IN_THE_OLYMPIAD_OR_CEREMONY_OF_CHAOS);
 			return;
diff --git a/L2J_Mobius_Classic_2.0_Saviors/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java b/L2J_Mobius_Classic_2.0_Saviors/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
index d7b9ce84d2..338341bd5e 100644
--- a/L2J_Mobius_Classic_2.0_Saviors/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
+++ b/L2J_Mobius_Classic_2.0_Saviors/java/com/l2jmobius/gameserver/network/clientpackets/ability/RequestAcquireAbilityList.java
@@ -28,6 +28,7 @@ import com.l2jmobius.gameserver.data.xml.impl.SkillData;
 import com.l2jmobius.gameserver.data.xml.impl.SkillTreesData;
 import com.l2jmobius.gameserver.model.L2SkillLearn;
 import com.l2jmobius.gameserver.model.actor.instance.L2PcInstance;
+import com.l2jmobius.gameserver.model.ceremonyofchaos.CeremonyOfChaosEvent;
 import com.l2jmobius.gameserver.model.holders.SkillHolder;
 import com.l2jmobius.gameserver.model.skills.Skill;
 import com.l2jmobius.gameserver.network.L2GameClient;
@@ -94,7 +95,7 @@ public class RequestAcquireAbilityList implements IClientIncomingPacket
 			activeChar.sendPacket(SystemMessageId.ABILITIES_CAN_BE_USED_BY_NOBLESSE_EXALTED_LV_99_OR_ABOVE);
 			return;
 		}
-		else if (activeChar.isInOlympiadMode()) // TODO: Add Ceremony of Chaos when done.
+		else if (activeChar.isInOlympiadMode() || activeChar.isOnEvent(CeremonyOfChaosEvent.class))
 		{
 			activeChar.sendPacket(SystemMessageId.YOU_CANNOT_USE_OR_RESET_ABILITY_POINTS_WHILE_PARTICIPATING_IN_THE_OLYMPIAD_OR_CEREMONY_OF_CHAOS);
 			return;