Complete Master Skill Tree: All Skills and Points in MU Online
Full guide to the Master Skill Tree in MU Online S6: rank structure, points per class, unlock requirements, exclusive skills and endgame distribution strategies.
What Is the Master Skill Tree in MU Online S6
The Master Skill Tree is the endgame progression system in MU Online Season 6. After reaching level 400 with the 3rd class and completing the corresponding evolution quests, the character begins earning mastery points with every master level gained. These points are allocated in a tree that is unique to each class, unlocking damage improvements, defensive boosts, buffs, cooldown reductions, and abilities that do not exist in the normal progression path.
In S6, the six available classes and their final evolutions are:
Dark Knight → Blade Knight → Blade Master
Dark Wizard → Soul Master → Grand Master
Fairy Elf → Muse Elf → High Elf
Magic Gladiator → (no 1st/2nd quest) → Duel Master
Dark Lord → (CMD exclusive) → Lord Emperor
Summoner → Bloody Summoner → Dimension MasterTree Structure: Ranks and Requirements
The Master Skill Tree is organized into 4 Ranks (or groups), progressing from foundational to elite. Unlocking skills in higher ranks requires a minimum number of points spent in earlier ranks. The general structure is:
| Rank | Points required from previous ranks | Predominant bonus type |
|---|---|---|
| Rank 1 | None (available from master level 1) | Passive stat bonuses (STR, AGI, VIT, ENE) |
| Rank 2 | 10 points in Rank 1 | Improvements to existing skills (damage, range, duration) |
| Rank 3 | 10 points in Rank 2 | Cooldown reductions, enhanced AoE skills |
| Rank 4 | 10 points in Rank 3 | Exclusive master abilities and elite bonuses |
Within each rank, skills are often split into three thematic columns — typically separating offensive, defensive, and support bonuses. Some ranks require points in specific column skills before the next skill below becomes available.
Class Breakdown: Blade Master (Dark Knight)
The Blade Master is the final form of the Dark Knight. Its master tree focuses on physical damage, attack speed, and survivability. The DK has one of the strongest mastery kits for intensive PvE farming areas.
| Master Skill | Rank | Primary effect |
|---|---|---|
| Increase STR | 1 | +STR passive per point allocated |
| Increase HP | 1 | +Max HP passive |
| Decrease Mana | 1 | Reduces skill mana cost |
| Sword Increase | 2 | Increases base sword damage |
| Attack Speed Increase | 2 | +Attack speed |
| Cyclone Strengthen | 2 | Increases Cyclone damage and range |
| Combo Strengthen | 3 | Enhances the DK's combo attack system |
| Death Stab Master | 3 | Improves Death Stab (damage and penetration) |
| Gigas Increase | 4 | Exclusive skill — massive temporary STR buff |
Class Breakdown: Grand Master (Dark Wizard)
The Grand Master concentrates its mastery on area-of-effect magic damage, mana cost reduction, and enhanced buff effectiveness. It is the class with the highest AoE damage potential in S6.
| Master Skill | Rank | Primary effect |
|---|---|---|
| Increase ENE | 1 | +ENE passive per point |
| Increase Mana | 1 | +Max Mana |
| Soul Barrier Strengthen | 2 | Increases Soul Barrier absorption |
| Lightning Strengthen | 2 | Increases Lightning damage |
| Nova Strengthen | 3 | Increases Nova damage and radius |
| Ice Storm Master | 3 | Improves Ice Storm (duration and damage) |
| Chain Lightning Master | 4 | Enhanced version of Chain Lightning |
Class Breakdown: High Elf (Fairy Elf)
The High Elf has the most versatile master tree in S6, with separate branches for support builds (buff/heal) and damage builds (bow). It provides the highest party support bonuses of any class in the game.
| Master Skill | Rank | Primary effect |
|---|---|---|
| Increase AGI | 1 | +AGI passive |
| Increase HP | 1 | +Max HP |
| Heal Strengthen | 2 | Increases HP restored by Heal |
| Defense Buff Strengthen | 2 | Improves the party Defense buff |
| Multishot Strengthen | 2 | Increases Multishot damage and projectile count |
| Arrow Rain Master | 3 | Enhanced AoE bow skill |
| Triple Shot Master | 3 | Triple Shot with extended range and damage |
| Infinity Arrow | 4 | Exclusive skill: continuous arrow barrage (channeled) |
Class Breakdown: Duel Master (Magic Gladiator)
The Duel Master inherits reduced versions of both the DK and DW trees. Its mastery reflects that duality — half the points benefit physical skills and half benefit magical ones. It is the most flexible build class in S6, though without the depth of either original class.
| Master Skill | Rank | Primary effect |
|---|---|---|
| Increase STR / ENE | 1 | +STR or +ENE (separate columns) |
| Sword Increase | 2 | Increases sword damage (physical branch) |
| Lightning Strengthen | 2 | Increases Lightning damage (magic branch) |
| Earthshake Master | 3 | Earthshake with wider area and higher damage |
| Plasma Ball Master | 3 | Plasma Ball with improved speed and damage |
| Chaotic Diseier Master | 4 | Duel Master exclusive skill |
Class Breakdown: Lord Emperor (Dark Lord)
The Lord Emperor is unique for having the exclusive Command (CMD) attribute, which determines how many and which familiars (Spirits) it can control. The DL's mastery tree has an entire branch dedicated to empowering those familiars.
| Master Skill | Rank | Primary effect |
|---|---|---|
| Increase CMD | 1 | +CMD passive (more active familiars) |
| Increase STR | 1 | +STR passive |
| Fire Burst Strengthen | 2 | Increases Fire Burst damage |
| Charisma Increase | 2 | Improves effectiveness of DL's party buffs |
| Dark Raven Strengthen | 3 | Dark Raven familiar with increased damage |
| Dark Horse Strengthen | 3 | Dark Horse familiar with improved stats |
| Imperial Fort | 4 | Exclusive skill: massive area buff for the whole party |
Class Breakdown: Dimension Master (Summoner)
The Dimension Master (final Summoner evolution) has the most debuff- and damage-over-time-oriented mastery tree in S6. The relevant ancient sets for Summoner include Gaia (Dark Soul) and Broy (Venom Mist).
| Master Skill | Rank | Primary effect |
|---|---|---|
| Increase ENE | 1 | +ENE passive |
| Increase Mana | 1 | +Max Mana |
| Sleep Strengthen | 2 | Increases Sleep duration and resistibility |
| Drain Life Strengthen | 2 | Drain Life with higher HP steal |
| Requiem Master | 3 | Requiem with larger area and damage |
| Sahamutt Master | 3 | Sahamutt with increased damage and range |
General Point Distribution Strategy
The most important decision in the Master Skill Tree is not spreading points randomly in the early master levels. The first 10 points should go entirely into one specific column of Rank 1 to unlock Rank 2 as quickly as possible.
Standard opening strategy (any class):
Master Level 1–10 → Rank 1, primary column for your build
Master Level 11–20 → Rank 2, core damage/buff skills
Master Level 21–30 → Complete requirements to unlock Rank 3
Master Level 31+ → Rank 3 skills and saving toward Rank 4From Rank 3 onwards, most classes start to feel a meaningful performance difference in farming areas. Rank 4 skills are the most powerful, but reaching them requires careful planning of earlier point allocations to avoid wasted capacity.
Summary Table: Rank Requirements by Class
| Class (3rd Evolution) | Rank 1 to 2 | Rank 2 to 3 | Rank 3 to 4 |
|---|---|---|---|
| Blade Master | 10 pts in Rank 1 | 10 pts in Rank 2 | 10 pts in Rank 3 |
| Grand Master | 10 pts in Rank 1 | 10 pts in Rank 2 | 10 pts in Rank 3 |
| High Elf | 10 pts in Rank 1 | 10 pts in Rank 2 | 10 pts in Rank 3 |
| Duel Master | 10 pts in Rank 1 | 10 pts in Rank 2 | 10 pts in Rank 3 |
| Lord Emperor | 10 pts in Rank 1 | 10 pts in Rank 2 | 10 pts in Rank 3 |
| Dimension Master | 10 pts in Rank 1 | 10 pts in Rank 2 | 10 pts in Rank 3 |
Rank transition requirements are standardized in official S6. The available skills within each rank, however, differ completely between classes — no master skill is shared between two different classes.
Perguntas frequentes
At what level can I access the Master Skill Tree?
The Master Skill Tree unlocks after reaching level 400 with your 3rd class evolution. From that point, every master level gained grants 1 mastery point to allocate in the tree.
How many mastery points can I accumulate in total?
Each master level grants 1 point. The theoretical maximum depends on the server — in standard S6 the master level cap is typically 200, giving 200 total points. Private servers may adjust this cap.
Does the Magic Gladiator have a Master Skill Tree?
Yes. The MG evolves into Duel Master and has its own tree. However, the MG skips both the 1st and 2nd evolution quests — it advances directly to the 3rd evolution upon reaching level 400, unlike all other classes.
Do master skills replace normal skills?
No. Master Skills enhance existing abilities or grant permanent passive bonuses. Normal skills remain in use throughout gameplay — mastery is an additional power layer stacked on top of the standard kit.
Does the Dark Lord need CMD for master skills?
The Dark Lord uses the exclusive Command (CMD) stat to control familiars and certain abilities. In the Lord Emperor mastery tree, some bonuses scale with CMD, but mastery points themselves are allocated independently.