How to Configure Master Level per Class on MU Online Server

Master Level (ML) is one of the most valued progression systems in MU Online private servers. Configuring it per class — rather than applying a single global value — allows you to create balanced gameplay experiences where Fairy Elfs and Dark Wizards can have different ML caps than Dark Lords or Rage Fighters. This guide covers the complete process for MuServer Season 6 (the most popular in private servers), with notes for Season 9+ throughout the text.

Prerequisites

Before starting, make sure you have:

• Access to SQL Server Management Studio (SSMS) connected to the MuOnline database
• Read/write permission on the GameServer/Data/ and GameServer/Setup/ folders
• The server shut down during edits to critical tables or class .ini files
• A database backup (see the backup tutorial before proceeding)

Step 1: Identify Your MuServer Version

The configuration method differs between versions. Run this query to check:

USE MuOnline
GO
SELECT name FROM sys.tables WHERE name LIKE '%Master%' OR name LIKE '%ML%'
GO

Interpret the results:

• Tables like T_ML_CLASS_INFO, T_ML_SKILL_LIST → Season 6 with database
• Table MasterLevelSkillTree → Season 9 to 13
• No ML tables found → configuration via .ini file (skip to Step 3)

Step 2: Configure Master Level per Class via SQL (Season 6)

2.1 Check the Class Table Structure

USE MuOnline
GO
SELECT * FROM T_ML_CLASS_INFO
GO

The table normally contains columns such as:

Class code reference table:

2.2 Change the ML Cap per Class

Example: set ML 200 for Dark Wizard, ML 150 for Rage Fighter, and ML 300 for Dark Knight:

USE MuOnline
GO

-- Dark Wizard (ClassCode 0): max ML 200
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 200, MLPointsPerLevel = 1, MLExpMultiplier = 100
WHERE ClassCode = 0

-- Dark Knight (ClassCode 1): max ML 300
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 300, MLPointsPerLevel = 1, MLExpMultiplier = 90
WHERE ClassCode = 1

-- Fairy Elf (ClassCode 2): max ML 200
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 200, MLPointsPerLevel = 1, MLExpMultiplier = 100
WHERE ClassCode = 2

-- Magic Gladiator (ClassCode 3): max ML 200
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 200, MLPointsPerLevel = 1, MLExpMultiplier = 100
WHERE ClassCode = 3

-- Dark Lord (ClassCode 4): max ML 200
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 200, MLPointsPerLevel = 1, MLExpMultiplier = 100
WHERE ClassCode = 4

-- Summoner (ClassCode 5): max ML 200
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 200, MLPointsPerLevel = 1, MLExpMultiplier = 100
WHERE ClassCode = 5

-- Rage Fighter (ClassCode 6): max ML 150 (balance adjustment)
UPDATE T_ML_CLASS_INFO
SET MaxMasterLevel = 150, MLPointsPerLevel = 1, MLExpMultiplier = 120
WHERE ClassCode = 6

GO

2.3 Set the Minimum Level Required to Activate Master Level

ML only becomes available when the character reaches the maximum normal level. Verify and adjust:

USE MuOnline
GO

-- Check current minimum level setting for ML activation
SELECT * FROM T_ML_CONFIG
GO

-- Set level 400 as the minimum requirement for all classes to activate ML
UPDATE T_ML_CONFIG
SET MinLevelToActivateML = 400
WHERE ConfigKey = 'GLOBAL_MIN_LEVEL'
GO

Step 3: Configure via MasterLevelSetting.ini

If your server uses .ini files for ML control, locate the file at:

GameServer/Data/MasterLevelSetting.ini

or in some versions:

GameServer/Setup/MasterLevelConfig.ini

3.1 Typical File Structure

Open with Notepad++ and look for per-class blocks:

[MasterLevel_DarkWizard]
Enable = 1
MaxMasterLevel = 200
PointsPerLevel = 1
ExpMultiplier = 100
MinLevelRequired = 400

[MasterLevel_DarkKnight]
Enable = 1
MaxMasterLevel = 300
PointsPerLevel = 1
ExpMultiplier = 90
MinLevelRequired = 400

[MasterLevel_FairyElf]
Enable = 1
MaxMasterLevel = 200
PointsPerLevel = 1
ExpMultiplier = 100
MinLevelRequired = 400

[MasterLevel_MagicGladiator]
Enable = 1
MaxMasterLevel = 200
PointsPerLevel = 1
ExpMultiplier = 100
MinLevelRequired = 400

[MasterLevel_DarkLord]
Enable = 1
MaxMasterLevel = 200
PointsPerLevel = 1
ExpMultiplier = 100
MinLevelRequired = 400

[MasterLevel_Summoner]
Enable = 1
MaxMasterLevel = 200
PointsPerLevel = 1
ExpMultiplier = 100
MinLevelRequired = 400

[MasterLevel_RageFighter]
Enable = 1
MaxMasterLevel = 150
PointsPerLevel = 1
ExpMultiplier = 120
MinLevelRequired = 400

3.2 Configure the ML Skill Tree per Class

Beyond the caps, each class has its own ML skill tree. Skill files are located at:

GameServer/Data/MasterSkillTree_[ClassName].bmd

or in the database:

USE MuOnline
GO

-- Check ML skills available for Dark Wizard
SELECT SkillID, SkillName, ClassCode, MLPointCost, MaxRank
FROM T_ML_SKILL_LIST
WHERE ClassCode = 0
ORDER BY SkillID
GO

To change the ML point cost of a specific skill:

USE MuOnline
GO

-- Increase point cost of a critical Dark Wizard ML skill (SkillID 350)
UPDATE T_ML_SKILL_LIST
SET MLPointCost = 3, MaxRank = 10
WHERE SkillID = 350 AND ClassCode = 0
GO

Step 4: Adjust ML Experience Rate in GameServer.ini

The global ML experience rate (applied before the per-class multiplier) is set in:

GameServer/GameServer.ini

Find and adjust the section:

[MasterLevel]
MasterExpRate = 100
; 100 = default rate (1x)
; 200 = double ML experience
; 50  = half ML experience

Step 5: Verify and Test the Configuration

5.1 Confirm the Saved Data in the Database

USE MuOnline
GO

-- Check final ML settings per class
SELECT
    ClassCode,
    MaxMasterLevel,
    MLPointsPerLevel,
    MLExpMultiplier
FROM T_ML_CLASS_INFO
ORDER BY ClassCode
GO

5.2 Check a Specific Character

USE MuOnline
GO

-- View a character's ML data
SELECT
    Name,
    Class,
    cLevel,
    MasterLevel,
    MasterPoint
FROM Character
WHERE Name = 'CharacterName'
GO

5.3 Fix Incorrect ML on a Character

If a character ended up with a higher ML than the newly configured cap:

USE MuOnline
GO

-- Reset ML to the new maximum (e.g., 200 for Dark Wizard)
UPDATE Character
SET MasterLevel = 200, MasterPoint = 0
WHERE Name = 'CharacterName' AND Class IN (0, 1, 16, 17, 32, 33)
-- Class 0,1 = base DW; 16,17 = Soul Master; 32,33 = Grand Master
GO

Step 6: Configuration for Season 9 to 13+

In newer versions, per-class ML configuration moved to the file:

GameServer/Data/MasterSkillTreeData.xml

or the MasterLevelSkillTree table in the database. The XML structure follows:

<MasterLevelConfig>
  <Class id="0" name="DarkWizard" maxML="200" pointsPerLevel="1" expMult="100" minLevel="400"/>
  <Class id="1" name="DarkKnight" maxML="300" pointsPerLevel="1" expMult="90" minLevel="400"/>
  <Class id="2" name="FairyElf" maxML="200" pointsPerLevel="1" expMult="100" minLevel="400"/>
  <Class id="3" name="MagicGladiator" maxML="200" pointsPerLevel="1" expMult="100" minLevel="400"/>
  <Class id="4" name="DarkLord" maxML="200" pointsPerLevel="1" expMult="100" minLevel="400"/>
  <Class id="5" name="Summoner" maxML="200" pointsPerLevel="1" expMult="100" minLevel="400"/>
  <Class id="6" name="RageFighter" maxML="150" pointsPerLevel="1" expMult="120" minLevel="400"/>
</MasterLevelConfig>

Troubleshooting

Problem: Character reached the maximum level but cannot activate ML

→ Verify that MinLevelRequired matches the MaxLevel configured on the server → Confirm that Enable = 1 for the character's class → Check if the client is updated to support the server's ML version

Problem: ML points disappear after restarting the server

→ The T_ML_CHAR_INFO table may not be persisting data correctly → Run: SELECT * FROM T_ML_CHAR_INFO WHERE CharName = 'CharacterName' → If empty, the ML persistence system may be disabled in GameServer.ini

Problem: ML skills do not appear in the skill tree even with ML active

→ Confirm that MasterSkillTree_*.bmd files match the client version → Verify that the T_ML_SKILL_LIST table has entries for the correct ClassCode → Re-export the .bmd files using a BMD editor if necessary

Perguntas frequentes