Season 13 to Season 18: The Modern Era and Recent MU Evolution
Complete guide to MU Online Seasons 13–18: new classes, element systems, Pentagram, Ruud currency, level 4 wings, and all major changes of the modern era.
The Transition from Season 12 to the Modern Era
After Season 12 consolidated the Master Level system and deepened the endgame content introduced in previous seasons, Season 13 marked the beginning of a new phase in MU Online: the Modern Era. This period, extending through Season 18 (the most recent version as of mid-2026), is characterized by increasing layers of complexity, new progression systems, and significant visual overhauls.
Season 6 — the foundation of most Brazilian private servers — had already established the six classic classes and their two evolution stages:
Dark Knight → Blade Knight → Blade Master
Dark Wizard → Soul Master → Grand Master
Fairy Elf → Muse Elf → High Elf
Magic Gladiator → Duel Master (no 1st/2nd quest, no Level 1 Wing)
Dark Lord → Lord Emperor (exclusive stat: Command/CMD)
Summoner → Bloody Summoner → Dimension MasterThe modern seasons expanded this roster substantially, adding new classes, a fourth evolution for each character, and entirely new progression systems.
Season 13: Pentagram and the Element System
Season 13 is widely regarded as one of the most impactful in modern MU Online history. Its standout feature was the introduction of the Pentagram and Errtel system, a new layer of elemental customization.
How the Pentagram Works
The Pentagram is an equippable item occupying an exclusive slot in the character panel. It has five receptacles that accept stones called Errtels, each associated with one of the game's five elements:
| Element | Errtel | Primary Effect |
|---|---|---|
| Fire | Errtel of Fury | Fire damage increase and defense penetration |
| Water (Ice) | Errtel of Radiance | Enemy speed reduction and Ice resistance |
| Earth | Errtel of Nature | HP increase and elemental defense |
| Wind | Errtel of Wind | Attack speed increase and critical hit rate |
| Lightning | Errtel of Lightning | Additional Lightning damage and stun chance |
Errtels are obtained through drops in high-level maps and Chaos Goblin combinations. Each Errtel can be upgraded up to level 5, with higher levels adding powerful secondary effects.
New Maps in Season 13
Season 13 also expanded the world map with level 400+ zones:
- Swamp of Calmness — mid-to-high level zone with elemental monsters
- Vulcanus — max-level map with rare Errtel drops
- Acheron — endgame area introduced progressively across patches
Season 14: The Grow Lancer and the Seventh Class
Season 14 brought the seventh playable class to MU Online: the Grow Lancer. Visually distinctive, the Grow Lancer wields a lance that physically increases in size as the class evolves — a unique visual effect in the game.
Grow Lancer → Shining Lancer → Mirage LancerMechanically, the Grow Lancer is a hybrid class: it uses the Agility stat as the base for physical damage, but some of its skills scale with Energy. Its signature ability, Chain Drive, chains attacks across multiple nearby targets, making it effective in both PvE and group PvP scenarios.
Ruud — The New Endgame Currency
Season 14 also introduced Ruud, an endgame currency obtained exclusively from high-level content:
| Ruud Source | Approximate Quantity per Run |
|---|---|
| Doppelganger (hard) | 300–500 Ruud |
| Imperial Guardian (elite) | 200–400 Ruud |
| Arena of Battle (ranking) | 100–300 Ruud |
| Chaos Castle (top 3) | 50–150 Ruud |
Ruud is spent at the Ruud Exchanger NPC to acquire Blood Angel and Holy Angel set equipment, as well as materials for modern pet progression.
Seasons 15 and 16: Level 4 Wings and the Fourth Evolution
Seasons 15 and 16 delivered two of the most anticipated systems for veteran players: level 4 wings and the fourth class evolution.
Level 4 Wings
Level 4 wings are the pinnacle of the MU Online wing system in the modern era. Each class has its own exclusive variant:
| Class | Level 4 Wing | Damage Bonus |
|---|---|---|
| Dark Knight / BK | Wings of Storm | +100 min/max damage |
| Dark Wizard / GM | Wings of Eternal | +110 magical damage |
| Fairy Elf / HE | Wings of Illusion | +95 damage + HP regen |
| Magic Gladiator | Wings of Ruin | +105 mixed damage |
| Dark Lord / LE | Cape of Lord (lv4) | +85 damage + CMD |
| Summoner / DM | Wings of Despair | +100 magical damage |
| Grow Lancer | Wings of Dragon | +100 physical damage |
The base recipe for crafting a level 4 wing in the Chaos Goblin requires:
- 1x level 3 wing of the class (+9 minimum)
- 5+ Jewels of Creation
- 1x Jewel of Chaos
- 1x Condor Flame (item exclusive to modern seasons)
- Variable Zen amount depending on the server
The Fourth Class Evolution
From Season 15 onward, each character received a fourth form. The evolution requires Master Level 200 and completion of a specific quest. The forms are:
Dark Knight → Blade Knight → Blade Master → Mythic Knight
Dark Wizard → Soul Master → Grand Master → Mythic Wizard
Fairy Elf → Muse Elf → High Elf → Mythic Elf
(... and so on for all classes)Each fourth evolution unlocks a set of new exclusive skills and dramatically alters the character model's appearance.
Seasons 17 and 18: Refinements and New Content
Seasons 17 and 18 focused on refining existing systems and expanding content:
- Expanded Muun system: new Muun pets with class-specific passive abilities
- New Arena rankings: seasonal system with weekly rewards in Ruud and exclusive items
- Guild system overhaul: new internal titles, formal guild alliances, and expanded territories
- Season 18: introduction of the Constellation system, adding passive bonuses based on groups of Errtels equipped in the Pentagram
| System | Introduced in Season | Game Impact |
|---|---|---|
| Pentagram + Errtels | 13 | High — new customization layer |
| Grow Lancer | 14 | Medium — new class |
| Ruud Economy | 14 | High — new endgame economy |
| Level 4 Wings | 15 | High — increased power ceiling |
| Fourth Evolution | 15 | High — extended progression |
| Advanced Muun System | 16 | Medium — pets with passives |
| Constellations | 18 | Medium — elemental synergies |
Comparison: Season 6 vs. The Modern Era
MU Online in Seasons 13–18 is a substantially different game from Season 6, even though it preserves the same core identity. The most impactful differences for a veteran S6 player are:
- Economy: in S6, Zen and Jewels (Bless, Soul, Life, Chaos, Creation, Guardian, Harmony) dominate. In modern seasons, Ruud and W-Coin create additional economic layers.
- Progression: the Level ceiling in S6 is 400 (Master Level 200). In modern seasons, systems like Constellation and Pentagram upgrades create infinite lateral progression.
- Content variety: S6 has classic events such as Blood Castle, Chaos Castle, Devil Square, and Castle Siege. Modern seasons add Doppelganger, Imperial Guardian, ranked Arena, and others.
- Classes: S6 has 6 classes. Seasons 13–18 reach up to 8 classes, with the Grow Lancer and an additional class introduced in Season 17.
The essence of MU Online — character progression, excellent items, ancient sets, and Castle Siege competition — remains intact. The Modern Era simply stacks systems onto that foundation, making the game more complex but also richer in progression options for the dedicated player.
Perguntas frequentes
What is the Pentagram system introduced in Season 13?
The Pentagram is a special equippable item with five receptacles for Errtels (elemental stones). Each Errtel adds elemental bonuses to the character, such as increased Fire, Ice, Lightning, Wind, or Earth damage. The item grows in power as Errtels are upgraded through Chaos Goblin combinations.
When was the Grow Lancer added to MU Online?
The Grow Lancer was introduced in Season 14, becoming the seventh playable class. Its signature feature is a lance that literally grows in size as the character evolves, making it a hybrid physical/magical damage class with chain attack mechanics.
What is the Ruud currency and what is it used for?
Ruud is a special currency introduced in the modern seasons (from Season 14-15 onward), obtained primarily in high-level events such as Doppelganger, Imperial Guardian, and Arena. It is used to purchase exclusive items from the Ruud Exchanger NPC, including Blood Angel and Holy Angel set equipment and advanced pet upgrades.
What are level 4 wings and who can use them?
Level 4 wings (Wings of Storm, Wings of Eternal, Wings of Illusion, Wings of Ruin, Wings of Despair, and Cape of Lord) were introduced from Season 15 onward and are the most powerful wings in the game. They are crafted using level 3 wings as the base material in the Chaos Goblin, along with specific Jewels. Each class has its own level 4 wing, requiring high Master Level to equip.
What changed in the class system with the fourth evolution?
From Season 14-15 onward, each class received a fourth evolution form with completely revamped visuals and exclusive high-level skills. The Dark Knight becomes Mythic Knight, the Dark Wizard becomes Mythic Wizard, and so forth. These evolutions require Master Level 200 and completion of specific modern-version quests.