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What is a "Underground Forces"?

Underground Forces Invasion

The Invasion based on the original MU Online and fully correspond to the original settings of our MU season.
During the Invasion period, a mission Invasion will be held to reward players with various items according to the levels obtained.
Note: In other private servers, this Invasion is called "Skeleton King"

When and how long will the "Underground Forces" Invasion is take place?

The "Underground Forces" Invasion will start exactly 20:00, that's in 11 hours, 24 minutes, 47 seconds from now, and the duration of the Invasion will be 30 minutes

What NPCs/monsters are involved in the Invasion?

Where the "Underground Forces" Invasion is taking place?

The Invasion called "Underground Forces" takes place random one of the following maps:
✌(◕‿-)✌ Page Under Maintenance ✌(◕‿-)✌


Golden Dragon

The Golden Dragon is an attack of golden monsters. Whoever kills a golden monster will recieve a some box of kundun as a reward.



Some special types of monsters dont have precise spawning points and appear occasionally within the game. These monsters are golden in appearance and are much stronger than the regular non-golden types. Rare treasures will be dropped when they are defeated. Two common golden monsters are Golden Budge Dragons and Golden Goblins. The former drop Boxes of Luck and the latter drop Boxes of Kundun +1. Both of these monsters can only show up in Lorencia, Noria or Devias. There is also a Golden Titan that spawns in Devias, Golden Drakan that spawns in Lorencia, Noria or Devias, Golden Lizard King that spawns in Atlans and a Golden Tantallos that spawns in Tarcan. They drop Boxes of Kundun +2, +3, +4 and +5 respectively. Also appears other Golden monsters like the Golden Soldier Troop, but these monsters dont drop Boxes of Kundun, only items or zen.


Golden Invasion

The Golden Invasion is an attack of golden monsters. Whoever kills a golden monster will receive a box of kundun as a reward.

Golden Goblin

Box Level : 1

Map : Lorencia, Noria

Golden Titan (escorted by Golden Soldiers)

Box Level : 2

Map : Devias

Golden Dragon

Box Level : 3

Map : Lorencia, Noria, Devias

Golden Lizard Kings (escorted by Golden Mermaids)

Box Level : 4

Map : Atlans

Golden Tantallos

Box Level : 5

Map : Tarkan

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