MU Online Season 10 Guide

Season 10 (2015) arrived in three parts and changed how Mu Online is played at the top end. Part 1 added the Grow Lancer class, reworked every master skill tree and ran the Evomon event. Part 2 opened the Nars map, introduced the Ruud currency, the Blood Angel mastery sets and rebuilt the event maps around a single plaza. Part 3 expanded the elemental system with the Errtel of Radiance, skill imprinting and a full drop-table rework.

Grow Lancer: the new lance class

You can create a Grow Lancer once the account holds a character of level 200 or higher; she starts in Lorencia. The second class name is Grow Lancer, the third is Mirage Lancer. She wears five armour pieces and fights with a lance and shield, and unlike every other class she has two special damage pools: Punishment attack power, which grows with strength, and Wrath attack power, which grows with agility. Both feed her skill damage.

Skills are learned from scrolls with stat gates rather than level gates: Spin Step needs 150 agility, Harsh Strike 150 strength, Magic Pin 300/300, Shining Peak 200 energy and level 220, Breche level 300. Circle Shield is unlocked by a quest from NPC Marlon at level 220. A party of Dark Wizard + Elf + Grow Lancer counts as a set party for the experience bonus.

Grow Lancer gear: lances, armour and capes

Three armour lines cover the levelling curve — Robust (drops from level 10), Gruhil (from 40) and Prinsi (from 60) — with the Rapid and Pluma shields alongside them.

The Cape of Limit costs 1 HP per successful attack and rolls three random options (HP or mana +50 + level×5, or a 3% chance to ignore defense). The Cape of Transcendence costs 3 HP per hit and rolls from a stronger list: 5% ignore defense, 5% damage reflect, 5% full HP recovery and 5% full mana recovery.

Master skill trees rebuilt

Season 10 Part 1 rebuilt the master trees for all seven classes, moved them into the new interface and raised most existing values. Mana and AG costs now rise as a skill's grade goes up. The stat nodes went from 12 to 14 per point (cap 90 → 108) and durability reduction from 12% to 18% (cap 90% → 135%).

New defensive nodes (shared across classes)

Notable new active skills

Damage nodes were raised across the board — for example Blood Storm's cooldown dropped from 10 to 5 seconds (3 when strengthened) and its strengthener from 5 to 11, Hellfire and Ice strengtheners went from 6 to 14, and the Dimension Master's Drain Life mastery jumped from 12 to 102 (cap 766).

Mirage Lancer master skill tree

Summon! Evomon event

Field monsters drop Summon Scroll Fragments; 25 of them combine automatically in the event inventory into an Evomon Summon Scroll. Drop the scroll on the ground and a level 1 Evomon is summoned, owned by you. Hunt it and it either evolves into a higher-level Evomon or the chain fails. Once you push an Evomon past level 30, each new scroll starts 4 levels higher than the last, up to level 69.

You cannot throw a scroll in a safe zone or in Chaos Castle, Blood Castle, Devil Square, Illusion Temple, Vulcanus, Doppelganger, Icarus or Kalima, and only one Evomon per player or party may be on the field. There is a time limit — let it expire and you get nothing.

Rewards land automatically in the Gremory Case (K). Your ranking entry is the highest Evomon level you hunted plus one, shown on the score banner at the top-left of the screen.

Event map renewal and the Event Map Plaza

All entry applications moved into one place: the Event Map Plaza. The old town NPCs no longer accept applications. Travel there from the move command window (M) or from an entry notification icon, for 20,000 zen.

Entry levels were unified into seven tiers — 50–179, 180–269, 270–349, 350–399, 400–500, 501–650, 651+ — for Chaos Castle, Blood Castle, Devil Square and Doppelganger. Illusion Temple uses five tiers starting at 180. Blood Castle and Devil Square each run 22 times a day; Illusion Temple runs at 21:00 and Doppelganger at 20:30.

Mastery Boxes are paid into the Gremory Case when the event ends, and only to characters at master level or above. The grade depends on your contribution: monster and player kills in Chaos Castle, gate and statue destruction in Blood Castle, statue captures in Illusion Temple, boss kills in Vulcanus. An energy elf with 1,500+ energy is credited with the party's average contribution instead. Fail the objective, or contribute too little, and you get nothing.

Ruud, the new currency

Ruud comes out of Mastery Boxes earned in Chaos Castle, Blood Castle, Devil Square, Illusion Temple, Doppelganger and Vulcanus. It behaves like zen — shown at the bottom of your inventory (I) — but it is bound to the character: no trade, no personal store, no vault, no dropping, and it is only accepted by Priest James.

Everything he sells is a sealed Blood Angel piece — the raw material for a mastery set. He only shows the set for the class of the character talking to him, and items bought from him cannot be sold back for Ruud (only to ordinary NPCs for zen).

To unseal a piece you need the Soul of the Ancient Hero. Combine an ancient set upgraded to +11 or higher (weapons and accessories excluded) at the Chaos Goblin for an 80% chance at the Soul, then combine the Soul with the sealed item for a guaranteed 100% unseal. The unsealed piece can be equipped and counts toward the set bonuses.

Blood Angel mastery equipment

Mastery gear is the new top tier for level 400 characters who have finished their third class change. It comes in three grades with three different sources:

Set bonuses

Excellent mastery armour also uses its own option pool, and mastery set pieces carry an exclusive stat option worth 15–30 to a single stat or 7–15 to all stats.

Nars, the sixth Acheron region

Nars holds the strongest elemental monsters in the game and is the only source of excellent Blood Angel gear. Arca War and the Acheron Guardian do not run there, and dying or disconnecting sends you back to the Acheron safe zone. Two field gate pairs shorten the walk: the blue gate links (42, 80) with (215, 34), the red gate links (41, 98) with (109, 230). The boss lives behind a separate gate, Core Magriffy's Nest at (179, 148).

Core Magriffy

The boss respawns every 24 hours with a random element. Poison rides on its normal attacks; Tornado spins up whirlwinds in four directions; Roar damages and knocks back; Clone splits it into two identical bodies and hitting the wrong one triggers Berserk, which adds a permanent +100 attack power each time it fires. Leave it alone and it regenerates every second. It drops 4 items, including pentagrams and three mount muuns.

All three run at 15× their base ability for the first 30 days after you get them.

Elemental system expansion (Part 3)

Part 3 rebuilt the pentagram and errtel layer. Elemental combination moved to NPC Adniel (Elbeland 37, 215 and Acheron 38, 216) with a new window that previews the result, keeps materials registered between attempts and drops the result into the Gremory Case if your inventory is full.

Errtels level up per rank and can rank up once every activated rank reaches +7; a rank-up randomly activates one option of the new rank. Elemental Runes are bought from the town NPCs (Amy, Fairy Lara, Silvia, Isabel) or found in Elemental Capsules, and the number needed climbs with level and rank — from 1 rune at rank 1 level 1 up to 11 at rank 3 level 10.

Dismantling

Set items and errtels can now be dismantled from the inventory. Each gives 1 Elemental Powder, and 50 powder becomes an Elemental Capsule (needs 4×4 free space to open). Capsules hold Errtels of Radiance, Radiance slot fragments, Elemental Runes and mid-tier pentagrams.

Spirit's Protection

Detaching an errtel from a pentagram of required level 299 or below always works. For level 300+ pentagrams you need Spirit's Protection, which makes the removal a guaranteed 100%.

Pentagram level requirements were also cut: the Lorencia Knights' Iron Wall Shield, Hero's Elixir and Gladiator's Dagger dropped from 300 to 150, their magic-imbued versions to 180, and Etramu's Scroll from 200 to 150. Elemental items stopped dropping from Ice Queen, Gorgon, Balrog, Hydra, Phoenix of Darkness and Hell Maine, and now drop in Atlans, Ubaid, Alkmaar, Debenter, Uruk Mountain and Nars instead.

Errtel of Radiance and skill imprinting

The fifth errtel, the Errtel of Radiance, mounts in a pentagram's fifth slot — which starts locked. Open it with a Radiance Slot Expansion Scroll, made from four Radiance Slot Fragments or pulled from an Elemental Capsule, then right-click the pentagram in your inventory and click the slot.

Skill imprinting

Skill imprinting (U) gives extra skill attack power when a registered skill's element matches your equipped pentagram's element. You imprint 5 basic skills on hotkeys 1–5 and 5 special skills (siege skills and the Dark Lord's Dark Spirit commands) on hotkeys 6–0. The bonus scales with the pentagram's upgrade level and the errtels mounted in it, and imprinted skills are marked in the corner of their icon. Special skills get no elemental bonus. The MU Helper can only use skills you have imprinted, so changing an imprint also changes your helper setup.

Experience, drops and quality of life

Part 2 raised hunting experience across every level band — a level 100 character killing a Yeti went from 275 to 439, a level 300 character on Alquamos from 1,132 to 1,912, a level 500 character on Erohim from 4,811 to 5,736.

Party experience is now calculated from the highest-level member's solo experience and split by level ratio. On top of that, experience follows damage: kill a 100,000 HP monster where you dealt 60,000 and someone else 40,000, and you get 60% of the solo experience while they get 40%.

Bulk combination

Several recipes can now be crafted in batches, with materials and cost scaled to the quantity and the success rate rolled per item: fruits ×16, invisibility cloaks ×6, Devil Square invitations ×8, SD potions ×32, potions of bless and soul ×25, gold and silver boxes ×16, dinorants ×2 at the Chaos Goblin; refining stones ×8 at Osbourne; Jewel of Harmony ×32 at Elpis.

Drop rework

Part 3 pinned most items to specific hunting grounds: potions and town portal scrolls to Lorencia, Elbeland, Noria, Devias and Dungeon; spell scrolls and orbs to matching level ranges; excellent pendants and rings to Atlans, Lost Tower 6–7 and Tarkan; spheres one tier per map (Karutan, Aida 2, Vulcanus, Kanturu Ruins); level 380 gear to Kanturu Ruins 3 and Kanturu Relics, with skill weapons only from the Dark Iron Knight; gemstones only from the Tower of Refinement.

Monsters now also drop the excellent version of whatever they visibly carry, and the field bosses Ice Queen, Gorgon, Balrog, Death King, Hydra and Zaikan got their own excellent drop tables with a 24 hour respawn and a single spawn. Blood Castle and Devil Square monsters drop equipment in tiers 1–4 only.

Smaller changes

Class-change quests can be tracked in the My Quest window (T), a live quest journal shows progress and turns green on completion, a Play Guide opens from the HELP icon or F1, and buff-type cash items bought from the in-game shop can be extended up to 50 days by using the same product again. At Uruk Mountain, approaching Lord Silvester now seals six entrances; leave the area empty for 60 seconds and the gates reopen with the boss back at full HP.