MU Online Season 12 Guide

Season 12 (2016-2017) is the fourth class change. Part 1 opened Nixies Lake with the boss Nix, added the Labyrinth of Dimensions and the Dark Angel weapon and Holy Angel armour tiers. Part 2 raised the level cap to 920, added the 4th class quest at NPC Sent, the skill enhancement tree with its debuff and explosion skills, the five-floor Deep Dungeon, around 200 guide quests and the Jewel Bingo minigame.

The 4th class change

Sent, a Guardian Knight of Lugard, came to Lorencia at Priest Devin's request to test the heroes of MU and pass on her techniques. Talking to her moves you to the Space of Qualification, where you can form a party; from there one member applies and the whole party moves into the Space of Trial. You need level 750 to enter and level 800 to finish the chain. Progress is saved, so you can leave and resume at the stage you reached.

The quest runs on the character who accepted it, and only party members at the same stage complete it with you. The scroll arrives through the Gremory Case and is held for 7 days. In total the chain pays 100 stat points.

Skill enhancement tree, debuffs and explosion skills

Finishing the 4th class change unlocks the skill enhancement tree, opened with Ctrl + A or from the character window. You gain 1 point per level and spend it on the tree. Each class has a fixed list of main skills that can be enhanced, and the enhanced version replaces the original skill. Skill enhancement options (damage, hit count, attack speed and range, splash damage, extra targets, cooldown reduction, weapon attack or wizardry power) apply only to the main skill they are attached to.

Debuffs

The tree also buys debuff options, which land on the target at the enhanced chance. Enhancing the basic option applies the basic debuff; the upgrade option upgrades it while the basic debuff is still running. All four debuffs can sit on a target at once. At launch they worked on monsters only.

Each explosion skill needs the upgraded debuff on the target and removes it when used — after which the debuff can be applied again. The MU Helper was extended to match: explosion skills cannot go in the basic skill slot, but both trigger skill slots accept them, and the trigger conditions moved into a single settings popup.

Level 920, new experience rules and attack speed caps

The level cap moved to 920. A third-class character stops earning experience at level 800 and only starts earning again after the 4th class change, and fourth-class characters gain experience only from monsters of monster level 160 or higher. The new experience table is applied at the moment of the class change, so characters already above 800 may see their level shift slightly — level 810 typically becomes 813 to 815, for example.

Damage now also depends on the gap between your level and the monster's. If your character level is above the monster level + 600, both your damage and the damage you take apply at 100%. Below that the difference costs you: roughly 10% per level of reduced attack damage and increased damage taken, capped at 70%. It applies to normal, elemental and debuff damage alike.

Attack speed is now hard-capped per class — buffs and items stop helping once you reach the number — and the character window shows it as current / maximum.

Nixies Lake

Nixies Lake was the most beautiful lake on the continent until Selupan's blizzard destroyed it and killed the spirit Nixie; her brother Nix turned into an evil spirit and now rules the frozen lake. Entry needs level 700, either through the gate in Raklion at (210, 218) or from the move command window for 50,000 zen. The monsters here drop excellent Holy Angel armour.

The Nix boss fight

The boss zone needs a Fragment of Spirit Nixie, bought from Priest James's Ruud shop (Elbeland 32, 239 or the Event Map Plaza 216, 55). Every member of a party needs one. Click the frozen Spirit Nixie at Nixies Lake (113, 109) and the fragment is consumed as you enter.

Once someone is inside, the door shuts and no one else can join; party members who die cannot come back in. After the kill you may stay 5 minutes before being moved to the safe zone at (24, 118), and the boss drops one item per character present when it dies.

Deep Dungeon

The Deep Dungeon is the levelling ground for the new cap. Entry needs level 770, on foot through the Lorencia entrance at (177, 31) or from the move command window. All five floors drop jewels, normal and excellent equipment, excellent Holy Angel armour and elemental items; rings appear from floor 3 and necklaces from floor 4.

Labyrinth of Dimensions

Elena's warped dimension became a solo dungeon. Enter through the Gate of Dimension at the Event Map Plaza (236, 58) — solo only, master level and above, and you need at least 10 stamina. The labyrinth resets every Thursday 8:00–10:00, and anyone still inside at 08:00 is thrown out.

It runs over 7 stages. Each stage is a set of disconnected rooms, arranged randomly, that you cross through gates: normal rooms are empty, special rooms spawn 4–8 endlessly respawning monsters and assign one mission (the gate only appears once it is done), and the exit room assigns five missions that clear the stage.

Rewards arrive in the Gremory Case and are held for 7 days; the number of Jewels of Bless scales with how many monsters you killed. Entries reset at the weekly maintenance and you start again from stage 1. Labyrinth monsters drop only zen, town portal scrolls do not work inside, and only rooms you have visited appear on the minimap.

Dark Angel weapons and Holy Angel armour

Season 12 stacked two more tiers on top of Blood Angel. Both upgrades are 100% and run at the Chaos Goblin in Noria (180, 103).

Dark Angel weapons require level 600 and carry excellent damage rate +10%, attack or wizardry +45, attack speed +7, +1.6 attack per 20 levels and life and mana recovery on kills.

Holy Angel armour requires level 800 and pushes the mastery set bonuses to their highest values yet. Excellent Holy Angel pieces drop from Nixies Lake and the Deep Dungeon.

Two combination materials were also renamed: the Soul of Ancient Hero became the Soul of Blood Angel, and the Fragment of Sealed Stone became the Soul of Dark Angel.

Dual-class mastery gear, quivers and Ruud

Energy elves and wizard-type magic gladiators finally got mastery sets of their own, sold sealed by Priest James for 30,000 Ruud a piece. Conversion scrolls move an existing set between builds at 100% at the Chaos Goblin, keeping the item's level and options.

Quivers

Bows and crossbows became one-handed: the bow goes in the left equip slot and a quiver in the right. A quiver is an enhanceable off-hand that takes Luck and additional damage, upgrades from +0 to +15, comes in normal, excellent, socket and mastery versions, and lets bows fire without consuming arrows. Its attack power and speed count only while a bow or crossbow is equipped.

Because both hands now hold socket items, the total socket count across them is capped at 6 — a 5-socket weapon leaves room for a 1-socket quiver only. To help, the Seed Master in Elbeland (46, 243) gained a socket slot reduction combination: an empty 4- or 5-socket item plus a Jewel of Creation, a Jewel of Chaos and 1,000,000 zen becomes a 3-socket item at 100%, keeping level, skill, Luck and options. Socket bows and crossbows now drop with 1 to 3 sockets.

Two more changes: a Dark Spirit can be kept in the inventory and activated by right-clicking, like the Dark Horse; and Ruud was redenominated — 1 Ruud became 100 Ruud, with every price and payout rescaled to match.

Master skill tree renewal

With debuffs moving to the new tree, the debuff-flavoured master skills were pulled out. Every class lost Increase Poison / Lightning / Ice Resistance and Strong Will, and a set of chance-based nodes changed from 1 point to 10 points per rank while their cap rose from 3.34% to 4.17%: Vengeance, double damage, ignore defense, excellent damage, critical damage, full mana recovery, full life recovery and full SD recovery.

Per class, the stun and slow masteries were removed and replaced with straight damage or utility. The Blade Master, for instance, lost Twisting Slash Mastery, Rageful Blow Mastery, Death Stab Proficiency and Mastery, Blow Mastery and both Iron Defense nodes; Blow Proficiency became a plain damage increase, Combo Strengthener moved from rank 8 to rank 7, and a new Max Life Amplification node was added at rank 7. A bug where some master skills gained nothing from a grade upgrade was also fixed.

Guide quests, Jewel Bingo and other changes

About 200 guide quests were added on their own tab in the quest window. They are accepted automatically as you reach the level for them, one at a time, and you claim the reward by clicking the quest window — no NPC needed. They ask you to travel somewhere, collect items, kill monsters, reach a level or finish another quest, and an Instant Move button teleports you to the map and walks you to the objective. Abandoning a quest immediately accepts the next one and the abandoned one is gone for good; a whole chapter can be switched off with the checkbox next to its title.

Jewel Bingo works like Mine Finder: collect 24 card pieces while hunting (tick "event item" in the Helper) to make a card bundle. Place your jewels on the board or use auto-place, choose a box, then click the jewel on your board matching each one the box calls. Lines across, down or diagonally score a bingo, lines through the MU in the centre are worth more, and the game ends when the box runs out. The reward box depends on your score and lands in the Gremory Case (K), where it lasts 1 day.

Event maps rebanded

Illusion Temple moved to five bands (180–299, 300–399, 400–599, 600–769, 770+) and pays 2 boxes from tier 3 up; the Imperial Guardian fortress also pays 2. The Ruud inside low, mid and high mastery boxes was reduced, and event map monsters were rebalanced to match the new bands.

Smaller changes: map movement levels were unified for first and second class characters (Dungeon 3 50→40, Atlans 70→60, Lost Tower 4 and 5 60→50); reconnecting in Feria, Nars or Nixies Lake puts you in the safe zone; unread mail now shows an icon that opens the mailbox; the login, character and friend windows were redrawn; and the move command window gained a favourites list of up to five destinations.