MU Online Season 17 Guide

If you have ever wondered why one wizard on the creation screen carries a magic book and another throws spheres from an orb, Season 17 is your answer. It added two classes at once and both are permanent. The rest of it splits into things you still use, things you walk past, and things later patches buried, and this guide sorts the 2021 - 2022 release that way: for somebody levelling on a Season 22 server, not somebody reading patch notes.

Where Season 17 lands on your level curve

Season 17 arrived in two parts and pushed the cap from 1,350 to 1,450. That tells you where its content was aimed: the end of the road in 2022, which on a server that has moved past it becomes content you pass through. The exceptions are the two classes and the client changes, which do not get replaced the way maps and item tiers do.

Sorted by the level you meet each piece at:

So: if you are picking a class, Season 17 is one of the most relevant seasons there is and everything else here can wait. If you are already deep into Season 22, the parts worth your time are the three maps and the Guardian.

Picking Kundun Mephis or Lemuria

The story is short. The Great Sage got inside Doppelganger Fortress in the year 1022 of MU, learned how the doppelgangers were made, and used relics Kundun and Lemuria had handled to copy them. The copies came out identical in looks, memory, ability and temper, but the Sage raised them, so they grew up on the right side and were sent after the originals.

Both are Energy casters, both start in Lorencia, and both share a set party with the Dark Knight. The difference is what you hold.

Lemuria starts with more life and vitality and carries the buffs, so she is the easier to learn on. Kundun Mephis is the glass cannon. Both are available from the start.

Low-level kit for either comes from Wizard Gilard in Lorencia (119, 111), and skill books from Wizard Pasi (119, 113) or Tavern Madam Liamon (125, 133).

The Bond, and why these two are worth duoing

The two are master and pupil, and the game pays you for playing them that way. One of each in a party switches on the Bond, and it reaches the whole group, not just the pair. If you duo or run two clients, this is the most useful thing on the page.

It has to be one of each: two Kundun Mephis, or two Lemurias, get nothing at all.

A quieter reward: items named after the villains years earlier now do something extra in either class's hands.

Thirteen skills, read as an unlock timeline

Both borrow heavily first. Kundun Mephis takes a dozen Dark Wizard skills: Power Wave, Lightning, Ice, Twister, Blast, Aqua Flash, Hellburst, Earth Prison, Illusion, Telekinesis, Teleport and Mana Increase. Lemuria mixes Dark Wizard and Elf skills, then adds five beginner buffs that are weaker copies of the Elf's and will not stack with them.

Everything unique to the two, sorted by Energy rather than split by class, so it reads as a plan for your points.

The shape of both classes falls out of that order. Lemuria front-loads, six skills live before Energy 200, which is why she feels playable early. Kundun Mephis has nothing between Shining Bird and Reflection Barrier, so his first few hundred levels lean on borrowed spells. Both capstones need ten mastery points in the skill below.

Two gear ladders, book and orb

Both lines run to full length rather than stopping at a starter weapon, and since they share tier names from Blood Angel up they read better side by side. Everything in both swings at attack speed 30.

The last row is the one to watch for: Soul-bracket damage for Energy 140, roughly what the first orb wants, so one landing early skips you several tiers.

Wings come in two steps tied to class changes rather than item tiers, each step one item with two names.

Armour runs the same length. The table runs top down, so where you are heading comes first. Figures are defence in the order helm, armour, pants, gloves, boots.

The two are within a handful of points at every tier, so armour is no reason to pick one. And Manticore is not the end of the line: it is the base item the 8th mastery set is built from.

Manticore and Celestial Brilliant, the two mastery rungs

The two tiers chain: Manticore armour is what you feed into Celestial Brilliant. Both upgrades run at a flat 100%, so there is nothing to gamble, only material to collect. Weapons go through the Chaos Goblin in Noria (180, 99), and both materials cost Ruud at James in Elbeland (32, 239).

Item type, Luck, the Excellent options and the stat options all survive, so the grind is getting a clean base item to +11 with 16 options.

Every Manticore weapon wants level 1,200 and carries the same Excellent block whatever the class: excellent damage rate +10%, attack or magic speed +7, life and mana of stat divided by eight per kill, +2.6 per 20 levels and a flat +74 attack power or wizardry damage. Below, sorted by class so you can find your line in one pass.

Two oddities. The Quiver's range runs downward, 651 low and 637 high, exactly as the patch note printed it. And the Shield keeps the Faith Knight option while rolling base defence +2.6 per 20 levels, reflect 5%, defence success rate +10%, max life and mana +286 and damage decrease 78.

Celestial Brilliant is four pieces rather than five, and which four depends on your class. It needs level 1,300, and Excellent Brilliant armour also drops raw in Burning Kethotum and the Kanturu Underground Facility. In the table, H is helm, A armour, P pants, G gloves, B boots, and the defence figures follow that order.

The energy Noble Elf is the outlier, around eighty points behind her agility counterpart at every slot. Set bonuses come in three steps, and the fourth piece carries the payload.

Two and three pieces are barely worth wearing by comparison, so assemble all four or none. The Faith Knight set goes its own way again: critical and excellent damage rate +40% each, Solid Protection party attack power +260, vitality +360, defence +240 and triple damage +7%.

Three hunting grounds, from level 700 to 1,190

Kethotum is where Kundun was put down. Etramu lured him in and split the Seal Stone into eight pieces to raise the strongest barrier ever cast. Kundun turned to stone mid-scream and the city dropped out of the world. A thousand years later Lemuria took the self of Gaion's descendant Antonias to bring him back, and he filled Kethotum with gates that pull demons through.

The third map's story is shorter. Arca scholars digging the Kanturu ruins found an unopenable door smashed apart with stairs behind it, could not get past what prowled the corridors, and the Noble Alliance sent knights instead. The three maps are really one stretch of your level curve, so compare them that way.

Old Kethotum is the same place rebuilt for the mid game: identical residents at a third of the level, entry 460 levels lower. It is the one you will see first by a long way. The Kanturu facility is organised by element, and Helper Plus sends you straight to the main or sub-main spot of whichever you pick.

Six monsters cover all three maps, with the Crimson trio doing double duty.

Both late maps carry five elemental elite zones with the same debuffs and drops, so one table covers both.

The debuffs are not a risk but a certainty: every hit lands its pair at a 100% chance, and only a Guardian with the matching elite resistance blunts them. Pick your element, then check what your Guardian resists. The payout is the usual elite set, Elite Option Change Fragments, Sealed Armour Fragments, Golden Emblems, Elite Guardian Enhancement Stones and the Jewel of Harmony, most behind a weekly cap.

Shining Tail and the Earring of Enchantment

These two read better together. Both materials come from Priest James in Elbeland (32, 239) for Ruud, both cost Bless ×20, Soul ×20, Chaos ×1 and Creation ×1 on top, and both read their odds off one card.

The Shining Tail is the 4th Guardian, equipped from the inventory at level 1,100 and made from the 3rd Guardian at the Trainer in Lorencia (122, 110) with the Seal of Shining Tail at 50,000 Ruud. A recoloured Shining Tail (Rare) with identical stats drops out of the same combination at a low rate: a cosmetic lottery, not a better item. Failure costs the materials and drops the base Guardian to +0.

The last row is the catch: a success rerolls the normal options and always rerolls the elite resistance, so the zone your Guardian protects you in is not your choice. Keep upgrading until the roll agrees.

The Earring of Enchantment is the 5th earring, built from an Earring of Vigour at +11 to +15 with the Mould of Enchantment at 25,000 Ruud. Sides are preserved, a left makes a left, and a base carrying three options comes out with at least two. The two sides are not symmetrical and are not worn at the same level.

The right side is stronger and the later unlock, so the left goes on first. Wear both and you get the earring set option, which older guides still call the season mastery bonus: ignore enemy defence +5%, all stats +8 and mastery damage +70. By the end of the season the ladder read Wrath, Ancestors, Honour, Vigour, Enchantment.

The Elf renewal, and the choice it forces

This is the part of Season 17 you are most likely to feel without knowing where it came from. The Elf had spent years being vaguely both things at once; Season 17 split her in two. Agility makes an archer, Energy makes a support with a shield of her own, and that is still the decision you make today. The three attack skills cost 1,000 Ruud each from Priest James in Elbeland.

The archer also got quieter help: bow, crossbow and quiver attack speed up, more attack speed per point of Agility, and slower durability loss, which is a repair bill you stop paying. Raining Arrow is the one to invest in: its branch runs attack power, damage count +2, additional damage rate, +1 target, splash damage, skill damage and weapon attack power, and carries deadly poison and bleeding.

The support Elf got something she had never had: her own shield line. Seven Fairy Shields, one per gear tier, each with a base option that makes Greater Elemental Defence hit harder.

Each shield also rolls up to two of reflect 5%, defence success rate +10%, max life, max mana and damage decrease, scaling from 165, 165 and 45 on Blood Angel to 286, 286 and 78 on Manticore. The Elf also gained two MU Helper buff slots of her own, four up to six, and a heal-support setting under Party Support, Auto Recovery Settings, Trigger Skill Settings, where Heal and Party Heal become the basic and trigger skills.

The cap, the rebalanced maps and the client changes

The cap moved twice, 1,350 to 1,400 in Part 1 and 1,400 to 1,450 in Part 2, each with a season reward box through the Gremory Case: 30 days to claim, 14 days valid once opened, nothing restorable. The two muuns below are a record of what 2022 players collected.

Both multiplied their base ability 20 times for 30 days.

Two maps pulled down the curve

The mid game had a gap, so two existing hunting grounds were moved rather than replaced.

Kubera Mine pays less experience to match, so it is a gear stop rather than a levelling stop. Penalty-free hunting starts at level 925 in the normal area and level 970 in the Abandoned Mine.

Six client changes you still use

None were headline features and all are in front of you every session.

What has been superseded

• Manticore is no longer the top weapon tier and Celestial Brilliant no longer the top armour tier. Both are real upgrades at 1,200 and 1,300, and both are rungs you pass.
• The 1,450 cap is history. Plan around your server's cap, not this one.
• Both season reward muuns are unobtainable. The claim windows closed in 2022.
• The Shining Tail is the 4th Guardian, not the last. Upgrade through it rather than settling on it.
• Enchantment is the 5th earring, not the final one.
• Burning Kethotum is optional if high exp carries you past 1,160 before you need a farm there.

Not superseded: the two classes, the Bond, the Elf's attack and support split, the Fairy Shields, and all six client changes.

What to do about Season 17

• If you want a caster, Lemuria is the gentler start and Kundun Mephis the harder hitter, and the choice is not reversible.
• With a regular duo partner, run one of each. The Bond is free damage for the whole party.
• Do not stall in Burning Kethotum for Brilliant armour if the upgrade chain is within reach. It runs at 100%.
• Check which element your Guardian resists before you touch an elite zone. Walking in without it is how people decide elite zones are broken.
• Take the Shining Tail base item to +15 before upgrading. A failure costs the materials and resets the Guardian to +0.
• Wear both earrings, or accept that you are leaving the set option on the table.
• Press Ctrl + V once so you know where your event inventory lives. Our custom jewel system makes that window matter.

Our server runs Season 22 on the latest server files, opens on 30 October 2026, and has high exp, stats capped at 32,700, events and mini-bosses all day, and a custom jewel system. Make an account and pick one of the two classes Season 17 gave you. The guide index runs the whole sequence.