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Devil Square

Devil Square Event in Mu online. Enter as one of 10 MUtizens to engage the forces of Kundun as they spawn in front of you in a endless barrage of attacks. Either alone or in a team only the strongest will survive the Devils Square. With the Devils Invitation, you are granted access into the Devils Square, where your strength will be tested...

LAST UPDATED30.08.2026 20:32

In MU's history, the Elf Tree once stood in Noria. Essentially, the tree still stands to this day, but now relocated. The Elf Tree was created by the Queen of all Elves, known as Aria. This tree, a sacred ancient monument, had the ability to produce Elves regularly.

Unfortunately, with time, Secrarium learned of the tree's great ability. Through dishonest tactics, he tricked Lugard into revealing the location of the Elf Tree. Having set his eyes on the tree's power of birth, Secrarium corrupted the tree and transformed it into what is now called the Immoral Tree. The Immoral Tree, now corrupt, gives birth to monsters.

The monsters horde grew to astronomical proportions, and the kingdoms of the MU continent had to combine their forces to entrap the Immoral Tree in a space of nothingness, where monsters could not escape. Monsters continued to spawn at regular intervals, from the tree, however after careful consideration Aria decided to make it a training arena for travelers.

Enter as one of 10 MUtizens to engage the forces of Kundun as they spawn in front of you in a endless barrage of attacks. Either alone or in a team only the strongest will survive the Devils Square. With the Devils Invitation, you are granted access into the Devils Square, where your strength will be tested.

How to play

Main Mission: Kill monsters and survive.

  1. When the event starts the monsters will instantly spawn all over the arena.
  2. You just have to kill monsters.
  3. Monsters will continue to spawn over 15 minutes.
  4. As the time progresses, the monsters which spawn will change and their difficulty will slightly increase.

 

How to enter

To enter the Devil Square, you need a Devil Square Invitation and go to Noria to talk to the NPC Charon which will send you to the event map and you must talk to the same NPC Charon .

Another way to enter is through the command window, if you press M and select Event Square you will be teleported to the event map where you can enter the main Mu events and in turn, you can enter the "Event Square" through the notification icon when the event is available.

Only the first 10 players who show the Devil Square Invitation to the NPC Charon can enter.

Devil Square Invitation

Item used to enter the Devil Square

                                                   Admission Notification

A Notification Icon will appear when the event is available for entry.

The Event Icon will be displayed on the game screen when it is available for entry and will disappear when its entry time expires.

You will move to the "Event Square" by clicking on the event notification icon.

[Location]

Noria: (172, 106)

[Location]

Event Square: (223, 92)

Devil Square level range

 

Devil SquareCharacter Level
11 ~ 80
281 ~ 130
3131 ~ 180
4181 ~ 230
5231 ~ 280
6281 ~ 330
7331 ~ MAX

 

How to get the Devil Square Invitation

To get the Devil Square Invitation you must go to the Chaos Goblin Machine and select the "Regular Combination" option and enter the following items.

 

Required Combination Material:

  1. Devil's Key
  2. Devil's Eye
  3. Jewel of Chaos
  4. Zen

* Only items of the same level can be combined to create the Devil Square Invitation for that specific Devil Square.

Probability: 80%

Successful Result: Devil Square Invitation.

Failed Result: All items will be destroyed.

[Location]

Noria: 180, 102

Devil's Eye

You can get this item by hunting monsters or by buying it from NPC

'Lumen the Barmaid'

Devil's Key

You can get this item by hunting monsters or by buying it from NPC

'Lumen the Barmaid'

Devil Square Invitation Combination

Item Drop

Devil Square Success Rate Items Zen
1 75% Devil's Key +1 & Devil's Eye +1 100.000
2 70% Devil's Key +2 & Devil's Eye +2 200.000
3 65% Devil's Key +3 & Devil's Eye +3 400.000
4 60% Devil's Key +4 & Devil's Eye +4 700.000
5 55% Devil's Key +5 & Devil's Eye +5 1.100.000
6 50% Devil's Key +6 & Devil's Eye +6 1.600.000
7 45% Devil's Key +7 & Devil's Eye +7 2.000.000
Item Monster Level Drop
Devil's Key +1 & Devil's Eye +1 Level 3
Devil's Key +2 & Devil's Eye +2 Level 36
Devil's Key +3 & Devil's Eye +3 Level 47
Devil's Key +4 & Devil's Eye +4 Level 60
Devil's Key +5 & Devil's Eye +5 Level 70
Devil's Key +6 & Devil's Eye +6 Level 80
Devil's Key +7 & Devil's Eye +7 Level 90

Reward

The event reward is Experience.

The higher you are in the ranking, the more experience you will receive.

You need to get the most event points.

Event points are earned by killing monsters.

You must survive the event in order to be ranked and receive the reward.

Drop Devil Square
NameTypeLevelLuckSkillExcellentAncientSocket
Elemental RuneItem0 - 0-----
Talisman of Luck 1%Item0 - 0-----
JewelsItem0 - 0-----

Rules

Event Duration: 15 minutes

Minimum Players: 1

Maximum Players: 10

  • The Devil's Square Invitation will be removed from your inventory when you enter Devil Square.
  • Each character can play this event a limit of 4 times per day.
  • If you die in Devil Square you will not lose experience, zen or drop items.
  • If the character has 'PK status', they will not be able to enter the Devil Square.
  • Party is allowed and can be formed inside the Devil Square.
  • The warp command can be used after entering the Devil Square.
  • The player who uses 'Town portal scroll' in Devil Square will return to Noria.
  • Players remaining in Devil Square after its completion will be returned to Noria.
  • PVP is not allowed.

 

Sub Quest

In order to do a Sub Quest you must go to the NPC Shadow Phantom Soldier and according to your level complete the mission.

Sub quests can only be done 1 time.

Level Quest Name Quest Requirements Reward
1 - 80 Listen to the Devil Square Description Press F1 to see the time of Devil Square 1 -
Get the supplies for Devil Square Kill 40 Cursed Lich located in Elbeland Devil's Invitation +1
Gain 50 points in Devil Square! Achieve 50 points in Devil Square 1 100.000 Zen
Clear Devil Square! Kill the monsters and survive the Devil Square 1
100.000 Exp
200.000 Zen
81 - 130 Listen to the Devil Square Description Press F1 to see the time of Devil Square 2 -
Get the supplies for Devil Square Kill 60 Death Cows located in Losttower Devil's Invitation +2
Gain 100 points in Devil Square! Achieve 100 points in Devil Square 2 200.000 Zen
Clear Devil Square! Kill the monsters and survive the Devil Square 2
400.000 Exp
300.000 Zen
131 - 180 Get the supplies for Devil Square Kill 80 Alquamos located in Icarus Devil's Invitation +3
Gain 130 points in Devil Square! Achieve 130 points in Devil Square 3
800.000 Exp
500.000 Zen
Clear Devil Square! Kill the monsters and survive the Devil Square 3
1.000.000 Exp
1 Jewel of Chaos
181 - 230 Get the supplies for Devil Square Kill 80 Iron Wheels located in Tarkan Devil's Invitation +4
Gain 160 points in Devil Square! Achieve 160 points in Devil Square 4
1 Jewel of Chaos
500.000 Zen
Clear Devil Square! Kill the monsters and survive the Devil Square 4 1 Jewel of Soul
231 - 280 Get the supplies for Devil Square Kill 100 Beam Knights located in Tarkan 2 Devil's Invitation +5
Gain 190 points in Devil Square! Achieve 190 points in Devil Square 5 1 Jewel of Soul
Clear Devil Square! Kill the monsters and survive the Devil Square 5 1 Jewel of Bless
281 - 330 Get the supplies for Devil Square Kill 120 Ice Walkers located in La Cleon Devil's Invitation +6
Gain 210 points in Devil Square! Achieve 210 points in Devil Square 6 1 Jewel of Bless
Clear Devil Square! Kill the monsters and survive the Devil Square 6 1 Jewel of Life
331 ~ MAX Get the supplies for Devil Square Kill 140 Shadow Knights located in Swamp of Peace Devil's Invitation +7
Gain 240 points in Devil Square! Achieve 240 points in Devil Square 7 2 Jewel of Soul
Clear Devil Square! Kill the monsters and survive the Devil Square 7 2 Jewel of Bless
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