Last updated: August 28, 2026

On this page: Episodes 1-3 · Why S6 · Rage Fighter · RF Skills · RF Items · Karutan · New Sets · Daily Quests · Master Renewal · Part 2 Gear & Quests · FAQ

MU Online Season 6 – Rage Fighter, Karutan & Master Renewal

Season 6 (2011) is the version half the private-server world still lives in — the final form of classic MU. Part 1 delivered the Rage Fighter, the desert map Karutan, new sets and daily quests; Part 2 rebuilt the master skill tree and armed the endgame with Phoenix Soul and Eternal Wing gear. Rebuilt here from the original patch notes with the original artwork.

Season 6 Episode 1, 2 and 3

Season 6 shipped in three parts, and private servers almost always advertise which one they run. Episode 3 is the one most people mean when they say "Season 6".

Episode	What it added
Episode 1	The Rage Fighter class, the Karutan maps, new set items and the daily quest system.
Episode 2	The Master skill renewal — a rebuilt master skill tree — plus new gear and weekly quests.
Episode 3	The final and most complete build. This is the standard reference point for "Season 6" servers and the version most classic private servers run.

Why Season 6 Is the Private Server Standard

Reason	Detail
Feature-complete, not bloated	All nine classic classes through Rage Fighter, the full master skill tree, and the classic event set — without 5th class changes, artifacts or mastery ladders to balance around.
Stable files	Season 6 server files have been maintained and debugged for well over a decade, so servers built on them tend to be more stable than newer-season ones.
The nostalgia version	For most long-time players Season 6 is the MU they remember, which is why it keeps drawing populations that newer seasons do not.
Easier to gear	Progression tops out at ancient sets and excellent items rather than a ten-tier mastery chain, so a casual player can realistically compete.

If you are choosing between versions: pick Season 6 for classic gameplay and larger populations, or Season 21 for the newest content and classes like the Crusader.

The Rage Fighter

Heir to the martial arts of the fallen kingdom Kalutan, passed down by the descendants of its royal knight order. A close-range fighter in the DK/MG mold who pairs strikes with debuffs — planting fear in enemies to sap their power — and detonates the divine beast's force for lethal effect even at range.

Basic info	Value
Creation	Level 150+ character on the account
Start	Lorencia
Base stats	HP 100 / MP 40 · STR 32, AGI 27, VIT 25, ENE 20
Class line	Rage Fighter → Fist Master (3rd class)

Playstyle	Original design notes
Solo	VIT build: heavy single-target damage + debuff kiting. ENE build: AoE farming with self-buffs
Party	ENE build buffs the whole party's defense rate and vitality — the melee buffer MU never had
PvP	ENE scaling raises divine power and skill rates; Dragon Slasher can neutralize the enemy's SD and hit HP directly
Siege	Buff support plus PvP skills that shut down key figures — commanders and guild masters

Rage Fighter Skills

Skill	Type	Req	Element	Effect
Killing Blow	Weapon	—	Earth	Fast combo strikes; plants fear — lowers enemy attack power
Beast Uppercut	Weapon	—	Fire	Heavy blow that shakes the enemy
Chain Drive	Combo	lvl 150	Ice	Flying kick into punches; slows the target
Dark Side	AoE	lvl 200	Wind	Rapid strikes on everything around the fighter
Dragon Roar	AoE	lvl 150	Earth	Divine dragon force — damage splashes to nearby enemies
Dragon Slasher	PvP	lvl 200	Wind	Massive flying kick at the vitals — chance to bypass SD and damage HP directly
Ignore Defense	Buff (self)	lvl 200	—	Attacks can ignore enemy defense; scales with energy
Increase Health	Buff (party)	lvl 150	—	Raises party vitality; scales with energy
Increase Block	Buff (party)	lvl 70	—	Raises party defense success rate

Killing Blow	Dragon Roar	Dragon Slasher	Increase Health

Skill scroll	Use level	Energy	Drops from monster level
Increase Block	50	80	70+
Increase Health	80	132	90+
Ignore Defense	120	404	100+
Chain Drive	150	—	80+
Dragon Roar	150	—	90+
Dark Side	180	—	100+
Dragon Slasher	200	—	90+

Both capes are mixed in the Chaos Goblin's regular combination and roll random cape options: the Cape of Fighter one of three (HP +50+5/lvl, mana +50+5/lvl, or 3% ignore enemy defense), the Cape of Overrule one of four 5%-chance procs — ignore-defense strikes, damage return, full HP recovery when hit, or full mana recovery when hit.

A signature quirk from the original notes: with wings (or the Fist Master cape) equipped, RF skills burn HP per hit — Killing Blow 2 HP × 4 hits, Chain Drive 4 × 8, Dragon Slasher a flat 100. The fighter literally pays in blood for flight.

Rage Fighter Items

He shares low-tier gear (Kris, short sword, axes, maces, Morning Star through Crystal Morning Star; leather/scale/brass/plate armor) and fights bare-fisted or with claw gloves:

	Weapon	Drop / Exc	Speed	Original lore
	Sacred Glove	52 / 77	25	Worn by Kalutan's fist disciples; red mountain-goat leather absorbs the shock of every strike
	Holy Storm Claw	82 / 107	30	Shaped as the divine white tiger, forged from wind-attribute metal — the claw of the Sarduin knights
	Piercing Blade Glove	105 / 130	35	Restored from Kalutan's ruins — blades on the glove for attack and defense in one motion

	Set	Drop levels	Original lore
	Sacred Fire set	50–66 (exc 75–91)	The red training garb of Kalutan's disciples
	Storm Zahard set	62–82 (exc 87–107)	Wind-metal alloy of the Sarduin knight order — metal armor light as cloth
	Piercing Groove set	82–101 (exc 107–126)	Blades jut from every plate — the strongest armor of Kalutan's ruins, hostile to whoever stands close

	Cape	Formula
	Cape of Fighter (2nd)	Level 180 + 2×cape level · DEF 15+2/lvl · DMG +20+2/lvl
	Cape of Overrule (3rd, Fist Master)	Level 400 · DMG +39+2/lvl · absorb 24+2/lvl

Karutan – the New Map

Kalutan's scorched homeland: entry at level 160+ on foot (170+ via the move window, 13,000 zen), connected to Aida. Karutan 1 holds the stronghold village — general and weapon merchants plus three warehouse keepers — while Karutan 2 is pure hunting field.

Karutan 1 — village, Aida gate, K2 gate	Karutan 2 — the open desert

	Monster	Lvl	HP	ATK	DEF
	Venomous Chain Scorpion	99	5,000	555–590	45
	Bone Scorpion	103	60,000	595–635	485
	Orcus — demon circling Kardamahal's seal	105	65,000	618–655	518
	Gollock — Kardamahal's second demon	108	72,000	685–735	545
	Crypta — swarms of the southern hives	111	78,000	705–755	560
	Crypos — its venom fells even Medusa	114	83,000	720–770	575
	Condra — stone spirit of Karutan's mystery	117	90,000	735–790	610
	Narcondra — Condra's greater form	120	96,000	750–815	640

New Set Items (Part 1)

Set	Pieces	Piece bonuses	Full set
Vega's Sacred Fire	Helm, armor, pants, gloves	2: attack rate +50 · 3: VIT +50 · 4: max ATK +30	Exc DMG rate +15%, double DMG +5%, ignore DEF 5%
Chamer's Sacred Fire	Armor, pants, gloves, boots	2: DEF +50 · 3: double DMG rate +5% · 4: DMG +30	Crit DMG +30, exc DMG rate +15%, skill ATK +30

The Rage Fighter's first ancient sets — both on his Sacred Fire line.

Daily Quests (Part 1)

MU's first true daily system, for levels 350–400: register as a free mercenary with Tersia in Devias (200,000 zen once), then pay a 50,000 zen deposit for the day's Level 1 Request Form — a different contract each weekday, usable in town only:

Day	Quest	Rewards (one at random)
Mon / Thu	The Underwater Temple — meet Veina in Kalima 6	500k exp, Jewel of Soul/Bless, red light box
Tue / Fri	The Stubborn Merchant — find the peddler Zairo touring the towns	1M zen, Jewel of Soul/Life, green light box
Wed / Sat	Glory of the Family — visit your Gens steward	500 Gens contribution, Jewel of Creation/Chaos, violet light box
Sun	The Guild's Secret — Tersia's own errand	1M exp, Jewel of Chaos, red + violet boxes

The colored light boxes are thrown on the ground to burst into items — the ancestor of every daily-reward chest on modern servers.

Master Skill Renewal (Part 2)

Part 2 tore down the Season 3 tree and built the system servers use today: three trees instead of four, every skill upgradeable to rank 20 at 1 point per rank. The trees follow one blueprint for every class:

The renewed three-tree window (Blade Master shown)

Tree	Character	Contents
Protection	Defensive passives — identical for all classes	Durability reduction I–III, PvP defense rate, max SD & SD recovery, mana/HP/AG regeneration, defense & defense rate, poison/lightning/ice resistance
Valor (class-named)	Active skill enhancement	Strengtheners and masteries for the class's own skills
Rage (class-named)	Offensive passives & buffs	Weapon-type strengtheners/masteries, buff upgrades, on-kill sustain

The renewed class trees in full, translated from the original notes (ranks 1–5 as revealed at launch; the Fist Master's followed the same pattern):

Blade Master — full Valor & Rage trees

Valor tree (skill enhancement)

Rank	Skill	Effect
1	Attack Rate Increase	Attack success rate rises
2	Cyclone / Slash / Falling Slash / Lunge Strengthener	Damage of each basic skill rises
3	Twisting Slash / Rageful Blow Strengthener	Damage of the core AoE skills rises
4	Twisting Slash Mastery	Chance to knock targets back
4	Rageful Blow Mastery	Chance to cut 10% durability off one equipped armor piece of the victim
4	Max HP Increase / Weapon Mastery	More HP; min/max attack power up
5	Blow / Strike of Destruction Strengthener, Max Mana	Late-game damage and mana pool

Rage tree (offense & buffs)

Rank	Skill	Effect
1	PvP Attack Rate Increase	Attack rate against players rises
2	Two-hand / One-hand / Mace / Spear Strengthener	Attack power up with that weapon type
3	Weapon Masteries	2H: PvP damage · 1H: attack speed · Mace: stun chance · Spear: double damage chance
4	Swell Life Strengthener / Mana Reduction / SD & HP on kill	Buff power, cheaper skills, sustain per kill
5	Swell Life Proficiency / Min ATK / Mana on kill	Buff also raises max mana; floor damage up

Grand Master — full Wisdom & Meadow trees

Wisdom tree (skill enhancement)

Rank	Skill	Effect
1	Attack Rate Increase	Attack success rate rises
2	Flame / Lightning / Expansion of Wizardry Strengthener	Core spells up; EoW also raises max wizardry
3	Inferno / Blast / Poison Strengthener	The Tarkan-era spells scale again
3	Expansion of Wizardry Mastery	EoW adds min/max wizardry and critical damage rate
4	Evil Spirit / Decay Strengthener, Magic Mastery, Max HP	The farming line plus min/max wizardry
5	Hellfire / Ice Strengthener, Max Mana	The classics finished

Meadow tree (offense & buffs)

Rank	Skill	Effect
1	PvP Attack Rate Increase	Attack rate against players rises
2	1H Staff / 2H Staff / Shield Strengthener	Wizardry or defense up per equipment type
3	Staff & Shield Masteries	1H: attack speed · 2H: PvP damage · Shield: defense rate
4	Soul Barrier Strengthener / Mana Reduction / SD & HP on kill	Barrier absorbs more; sustain per kill
5	Soul Barrier Proficiency / Min Wizardry / Mana on kill	Longer barrier, higher damage floor

High Elf — full Salvation & Gale trees

Salvation tree (skill enhancement)

Rank	Skill	Effect
1	Attack Rate Increase	Attack success rate rises
2	Heal / Multi-Shot / Summon HP Strengthener	Support and AoE lines both scale
3	Penetration / Defense Increase Strengthener, Summon DEF	Damage and buff power
3	Multi-Shot Mastery	Multi-Shot fires one extra arrow
4	Attack Increase Strengthener / Weapon Mastery / Max HP	Buff power and raw attack
5	Attack & Defense Increase Masteries / Ice Arrow Strengthener / Max Mana	Buffs last longer and hit harder

Gale tree (offense & buffs)

Rank	Skill	Effect
1	PvP Attack Rate Increase	Attack rate against players rises
2	Bow / Crossbow / Shield Strengthener	Attack or defense up per equipment type
3	Bow / Crossbow / Shield Masteries	Bow: attack speed · Crossbow: PvP damage · Shield: defense rate
4	Mana Reduction / SD & HP on kill	Cheaper skills, sustain per kill
5	Infinity Arrow Strengthener / Min ATK / Mana on kill	The signature buff gains bonus damage

Dimension Master (Summoner) — full Chaos & Honor trees

Chaos tree (skill enhancement)

Rank	Skill	Effect
1	Attack Rate Increase	Attack success rate rises
2	Fire / Wind / Lightning Book Skill Strengthener	Elemental book skills hit harder
3	Book Masteries	Fire: damage over time · Wind: 3-second stun chance · Lightning: knocks targets 2 tiles back
3	Sleep Strengthener	Sleep lands more often
4	Chain Lightning / Lightning Shock Strengthener / Max HP	Her AoE core scales
5	Magic Mastery / Drain Life Strengthener / Max Mana	Wizardry and curse power up

Honor tree (offense & buffs)

Rank	Skill	Effect
1	PvP Attack Rate Increase	Attack rate against players rises
2	Stick / Other-World Book Strengthener	Wizardry and curse power per equipment
3	Stick / Book Masteries	Stick: PvP damage · Book: attack speed
4	Berserker Strengthener / Mana Reduction / SD & HP on kill	Berserker's curse bonus grows — and so does its defense penalty
5	Berserker Proficiency / Min Wizardry & Curse / Mana on kill	Berserker also raises ATK/wizardry and max mana

Duel Master (MG) — full Steadfast & Ultimate trees

Steadfast tree (skill enhancement)

Rank	Skill	Effect
1	Attack Rate Increase	Attack success rate rises
2	Cyclone / Lightning / Twisting Slash / Power Slash Strengthener	Both halves of the hybrid scale
3	Flame / Blast Strengthener / Weapon Mastery	Spells and raw attack
4	Inferno / Evil Spirit Strengthener / Magic Mastery / Max HP	The caster side finished
5	Blood Attack / Ice Strengthener / Max Mana	Fire Slash line capped

Ultimate tree (offense & buffs)

Rank	Skill	Effect
1	PvP Attack Rate Increase	Attack rate against players rises
2	2H Sword / 1H Sword / 1H Staff / 2H Staff Strengthener	One-hand sword bonus applies 50% per blade when dual-wielding
3	Weapon Masteries	2H sword: PvP · 1H sword: speed · 1H staff: speed · 2H staff: PvP
4	Mana Reduction / SD & HP on kill	Sustain per kill
5	Min Wizardry / Min ATK / Mana on kill	Both damage floors rise

Lord Emperor — full Justice & Conquest trees

Justice tree (skill enhancement)

Rank	Skill	Effect
1	Attack Rate Increase	Attack success rate rises
2	Fire Burst / Force Wave / Dark Horse Strengthener	Skills up; the horse gains defense
3	Critical DMG Increase Strengthener / Earthshake Strengthener / Weapon Mastery	The buff and the horse stomp scale
4	Fire Burst Mastery / Dark Horse Mastery	Fire Burst gains a stun chance; Earthshake stuns by chance
4	Critical DMG Increase (2) / Max HP	Buff duration up
5	Critical DMG Increase (3) / Fire Scream Strengthener / Max Mana	Buff adds crit rate; the Season 2 skill capped

Conquest tree (offense & buffs)

Rank	Skill	Effect
1	PvP Attack Rate Increase	Attack rate against players rises
2	Dark Spirit / Scepter / Shield Strengthener + Pet Strengthener	Raven, scepter, shield and pet damage
3	Dark Spirit (2) / Scepter & Shield Masteries / Command ATK	Raven crits; command stat feeds attack
4	Mana Reduction / SD & HP on kill	Sustain per kill
5	Dark Spirit (3) / Pet Durability / Min ATK / Mana on kill	Raven deals excellent damage; pets last longer

Every weapon mastery follows the same grammar — strengthener first (raw power), mastery second (a proc: stun, knockback, speed or PvP bonus) — and every class closes rank 4–5 with mana reduction and the on-kill SD/HP/mana trio. Full modern layout: master skill tree guide.

Part 2 – New Gear & Weekly Quests

	Item	Class	Stats
	Eternal Wing Stick	Summoner	Drop 147, wizardry 53, level 380
	Absolute Stick of the Archangel	Summoner	Wizardry 73 — the archangel weapon joins her arsenal
	Eternal Wing set	Summoner	Drop 99–131, level 380, energy-hungry (helm alone: ENE 808)
	Phoenix Soul Star	Rage Fighter	Drop 147, ATK 122–128, level 380, STR 465
	Phoenix Soul set	Rage Fighter	Drop 119–143, level 380 — his endgame armor

Phoenix Shot — the Star's built-in ranged skill: knockback plus a defense-rate debuff, 30 mana

Weekly hero quests also arrived: repeatable event-map contracts — kill monsters in Chaos Castle, clear Blood Castle delivering the archangel weapon in time, survive Devil Square to the end, win Illusion Temple — a full ladder from level 240 to master level:

Quest chain	Bracket	CC objective	Exp reward	Jewel pool (1 random)
Hero's Quality	240–270	Kill 5	800,000	Chaos, Soul, Bless
Hero's Courage	300–320	Kill 10	3,000,000	Chaos, Soul, Bless, Creation
Hero's Will	331–350	Kill 20	5,000,000	Chaos, Soul ×2, Bless, Life
Hero's Spirit	351–380	Kill 30	8,000,000	Soul ×2, Bless, Harmony, Chaos
Hero's Perseverance	381–400	Survive the clear	8,000,000	Soul ×2, Bless, Harmony, Life
Hero's Final Test	Master level+	Survive the clear	5,000,000	Soul ×2, Bless, Life ×2

Part 2 also added the expansion quests every S6 player remembers: level 50 — the Ancient Statue from Death Knights buys a Warehouse Expansion Certificate; levels 150 and 300 — Magic Cloth (Silver Valkyrie) and Cloth of Space (Alquamos) each earn a Magic Backpack inventory expansion (relog after use to activate). And the quality-of-life pass: right-click moves items in trade, zen trades up to 9 digits, Gens chat with the $ prefix, chat channel hotkeys F2/F6–F9, and parties surviving a disconnect for 5 minutes.

The Season 6 World – Every Map

Season 6 Episode 3 runs 28 hunting maps on top of the towns, with 534 monster definitions in MonsterList.xml. The table below is read straight out of a stock IGCN Season 6 Episode 3 server package — warp levels and warp costs come from MoveReq.xml, spawn counts and level ranges from MonsterSpawn.xml. Most servers keep these defaults, so this is what you will actually meet when you log in.

Map	Warp level	Warp cost	Spawns	Monster levels	Main residents
Lorencia	Lv 10	2 000 zen	290	2–19	Budge Dragon, Spider, Bull Fighter
Noria	Lv 10	2 000 zen	400	2–18	Spider, Chain Scorpion, Agon
Elbeland	Lv 10	2 000 zen	243	2–48	Hideous Rabbit, Strange Rabbit, Polluted Butterfly
Devias	Lv 20	2 000 zen	280	20–52	Elite Yeti, Hommerd, Ice Monster
Dungeon	Lv 30	3 000 zen	255	19–55	Ghost, Cyclops, Skeleton
Lost Tower	Lv 50	5 000 zen	442	47–66	Poison Shadow, Shadow, Death Knight
Atlans	Lv 70	4 000 zen	337	43–74	Silver Valkyrie, Great Bahamut, Lizard King
Tarkan	Lv 140	8 000 zen	217	72–93	Tantalos, Beam Knight, Mutant
Icarus	Lv 170	10 000 zen	80	75–108	Alquamos, Great Drakan, Queen Rainier
Aida	Lv 150	8 500 zen	251	72–120	Death Rider, Blue Golem, Forest Orc
Kanturu	Lv 160	9 000 zen	210	80–129	Berserker, Satyros, Splinter Wolf
Kanturu Ruins	Lv 230	12 000 zen	63	117–119	Persona, Twin Tale, Dreadfear
Kanturu Refinery Tower	—	—	—	—	Event map — Nightmare and the Maya fight spawn here
Crywolf	Lv 300	15 000 zen	174	97–134	Hammer Scout, Lance Scout, Bow Scout
Balgass Barracks	—	—	28	117–119	Balram (Trainee Soldier), Death Spirit (Trainee Soldier), Soram (Trainee Soldier)
Balgass Refuge	—	—	9	118–128	Soram (Trainee Soldier), Death Spirit (Trainee Soldier), Dark Elf (Trainee Soldier)
Land Of Trials	—	—	203	75–128	Ax Warrior, Lizard Warrior, Poison Golem
Swamp Of Calmness	Lv 400	15 000 zen	282	95–137	Ice Napin, Sapi Queen, Shadow Master
Raklion	—	—	120	102–148	Dark Giant, Iron Knight, Dark Iron Knight
Vulcanus	Lv 30	15 000 zen	265	90–124	Zombie Fighter, Ash Slaughterer, Resurrected Gladiator
Karutan 1	Lv 170	13 000 zen	123	99–114	Bone Scorpion, Venomous Chain Scorpion, Crypta
Karutan 2	Lv 170	14 000 zen	133	105–120	Condra, Narcondra, Orcus
Valley Of Loren	—	—	—	—	Castle Siege battlefield, populated only during the siege
Arena	Lv 50	2 000 zen	—	—	Duel arena, no monsters
Loren Market	—	—	—	—	Trade town added in Season 6
Santa Village	—	—	—	—	Seasonal Christmas town
Kalima 1–7	Ticket only	—	439	17–147	Reached with a Lost Map from Kalima 1 to 7

Warp costs scale with the sub-area. Lost Tower alone has seven warp entries from 5 000 to 8 000 zen, and Devias, Dungeon, Atlans and Elveland each have numbered follow-up warps that cost 500 zen more per step.

The Season 6 Event Clock

These are the default schedules shipped in the Season 6 Episode 3 server files. Servers edit them, but almost all of them start from this timetable, which is why Blood Castle on half past the hour and Devil Square on even hours feel familiar on every S6 realm you join.

Event	Starts (server time)	Length	What happens
Blood Castle	00:10, 00:40, 01:10, 01:40, 02:10, 02:40 … (22/day)	15 min	Seven levels plus the Master round; escort the Archangel weapon out before the clock runs down.
Chaos Castle	01:00, 15:00, 17:00, 19:00, 21:00, 23:00	10 min	Free-for-all on a shrinking floor - last player standing takes the prize.
Devil Square	00:00, 02:00, 04:00, 06:00, 08:00, 10:00 … (12/day)	20 min	Seven exp rooms, 10 players per room, ranked by score at the end.
Illusion Temple	01:00, 05:00, 09:00, 16:00, 19:00, 21:00 … (7/day)	15 min	Two teams race to 7 match points; the Fenrir upgrade drops here.
Crywolf	02:10, 04:10	—	Defend the altars against Balgass. Losing it disables the Crywolf buffs.
White Wizard Invasion	02:00, 12:10, 18:00, 22:00	30 min	The White Wizard leads Destructive Ogre Soldiers into the towns.
Loren Deep (Balgass raid)	20:00	—	Three waves of Balgass minions in the Valley of Loren.
Selupan (Raklion Hatchery)	00:00, 06:00, 12:00, 18:00	—	Break 15 eggs to summon Selupan; the boss zone seals 300 seconds after.

On top of the events there is a bonus window four times a day — 02:00–04:00, 08:00–10:00, 14:00–16:00, 20:00–22:00 — giving ×1.5 experience, +15% item drop and +5% excellent drop. Castle Siege runs on a 14-day cycle rather than a daily clock, and the Doppelganger and Imperial Guardian events are entered with mixed invitations — the Imperial Guardian invitation mix costs 1 000 000 zen and each of its four rounds gives you 10 minutes.

The Season 6 Guide Index

Every guide on MuOnline.Net that applies to a Season 6 server, grouped by what you are trying to do. Later-season pages are excluded — nothing here needs content that Season 6 does not have.

FAQ

Where can I play Season 6?
The biggest listing on the site: Season 6 private servers — new openings almost daily.

Why do RF skills drain my HP?
Original design: with wings or the cape equipped, his skills cost HP per hit (2–4 HP per strike, 100 on Dragon Slasher). Build vitality accordingly.

Is Season 6 the same as Season 6 Episode 3?
Episode 3 is the final polish of this content — the build private servers standardized on. Everything in this guide is included.

What came after?
Season 7 and beyond drift toward the modern game — if you want that story, start with our Ruud guide for where the endgame went next.