MU Online 5th Skill Tree Guide – Ability Enhancement System

Master the MU Online Season 21 Ability Enhancement System with our complete 5th Skill Tree guide covering progression, upgrades, PvP optimization, PvM builds, and enhancement strategies.

Hello Adventurers of the Epicmu Universe !!

After the 5th class change, create an ‘Ability Card’ using ability determination items,

You can further strengthen your character by attaching it to the ‘Ability Enhancement Core’.

Ability Determination, Ability Enhancement Stone Information

Ability Determination	Item Description
	This item can be obtained by Elites monster, and is a material item required to create skill cards.

Ability Enhancement Stone	Item Description
	This is an item that can be created through the CM (Chaos Machine). It is necessary to use Ability Determination, and it is a material item necessary to increase the level of an ability card.

Ability Enhancement Core UI Settings:

Ability enhancement core slot classification

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A) Extra card slot and installation settings:

Extra card slot	Extra Ability Card
	Get Card	Obtained through 5th job advancement quest reward (Nuke/Bolt/AoE)
Slot open conditions	Open upon completion of 5th job change
Card loading conditions	no conditions

B) [Skill] Ability card slot and installation settings:

Skill Ability Card Slot	Extra Ability Card
	Get Card	Produced through Chaos Goblin (Ability Determination: 50)
Slot open conditions	5th class change completed, level 800 master tree open and 1 slots blue open; level 850 2 slots blue open level 900 3 slots green open level 950 4 slots green open level 1000 5 slots purple open level 1050 5 slots purple open
Card Loading Conditions	[Skill] Ability cards can be equipped with skills that have been strengthened in the skill enhancement tree, and all enhancement effects and debuffs are maintained. Example) [Skill] Gale Meteor Storm Equipment Condition - Meteor Storm Enhancement Skill Enhancement
Redundant mounting conditions	The same [Skill] ability card can be worn multiple times in 3 slots. When equipped in duplicate, the ‘Skill Attack Power’ stat overlaps. However, additional effects and additional options do not overlap.

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1.) Option Ability card slot:

Division	Type 1	Type 2	Type 3	Type 4	Type 5
Blue Option
Green Option
Purple Option

Optional Ability Card
Get Card	Produced through Chaos Goblin (Ability Determination: 5)
Slot open conditions	5 slots open upon completing the 5th job change, and 5 slots open per 50 levels thereafter.
Card loading conditions	[Option] Ability cards are classified by color and type 1 to type 5, and can be installed in any order in the open slots appropriate for each type. [Skill] Regardless of whether the ability card is equipped, the character's abilities are strengthened when equipped.

2.) Elite Ability card slot:

Blue Elite	Green Elite	Purple Elite

Elite Ability Card
Get Card	Produced through Chaos Goblins (Ability Determination: 25)
Slot open conditions	Slots open when all [option] ability cards are installed in the five preceding option slots
Card loading conditions	You can equip an [Elite] ability card of the same minimum level as the [option] ability card installed in the preceding option slot.

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When 5 prerequisite [Option] Ability cards are equipped, the [Elite] slot opens.

The level of the [Elite] Ability Card that can be equipped is the same as the minimum level of the equipped [Option] ability card.

3.) [Skill] Ability Card configuration for each class:

Class	Skill name	Additional effects
Darkness Wizard	Meteostorm of Gale	Increased attack speed
Ignition Knight	Saturating Sword Blow	Increased range
Ignition Knight	Gale of Destruction	Increased attack speed
Royal Elf	Raining Arrow of Saturation	Increased range
Royal Elf	Holy Bolt of Gale	Increased attack speed
Duple Knight [STR]	Chaos Blade of Saturation	Increased range
Duple Knight [ENE]	Havok Sphere of Anger	Add splash damage
Force Empire	Wind Soul of Saturation	Increased range
Endless Summoner	Fire Beast of Saturation	Increased range
Endless Summoner	Deathside of Fury	Add splash damage
Bloody Fighter	Dark side of saturation	Increased range
Bloody Fighter	Spirit Hook of Saturation	Increased range
Arcane Lancer	Oversting of saturation	Increased range
Arcane Lancer	Gale Wildbreath	Increased attack speed
Infinity Rune Wizard	Gale Lightning Storm	Increased attack speed
Rogue Slayer	Fierce Attack of Saturation	Increased range
Magnus Gun Crusher	Gale's Bursting Flare	Increased attack speed
Glory Wizard	Spearstorm of Saturation	Increased range
Battle Mage	Ultimate Force of Saturation	Increased range
Phantom Pain Knight	Bladestorm of Saturation	Increased range

① Ability skills can be used when equipped with a [Skill] Ability Card, and can be used when strengthening Skills in the Skill Enhancement Tree. ② All cards can be created using the Chaos Machine located in Noria Map.

Ability Level Up & Reduce

You can use the ‘Ability Level Up/Reduce’ function by right-clicking on a card acquired from the Ability Card Book.

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Ability Card Level Up When you acquire additional Ability Cards that you already own, your card holding amount increases, and you can level up the selected Ability Card using additionally acquired cards and the 'Ability Enhancement Stone' item. The number of ‘Ability Cards’ and ‘Ability Enhancement Stones’ required to level up can be checked in the UI. Ability card maximum level Ability cards can be strengthened up to level 5;