These challenging max-level additions arrive with the Unchained update on March 2.
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Naryu Labyrinth

The Naryu Labyrinth is an Epic difficulty max-level dungeon available in 6- and 4-player versions. While the encounters and enemies you’ll face are certainly challenging all on their own, you’ll also need to jump, glide, and find your way through this sprawling maze. Each room contains a unique encounter that—when defeated—will unlock a door at random to the next room. Progressing will follow with a similar random advancement to the room beyond, the room beyond that, and so on; creating a unique and challenging experience each time you enter the Labyrinth.

While there are countless individual rooms that you’ll progress through randomly, there are three total floors to descend, and a boss to defeat that guards each of the exits to the next floor below.



Minou

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Be Ido

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Fujin and Raijin
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Each boss has their own tantalizing treasures to take once they’ve been defeated, but along the way you’ll also acquire Naryu Labyrinth Relic Pieces, which can be turned in to Exchanger Junsu just outside the entrance for a Labyrinth Treasure chest, which contains a variety of items, including the coveted Black Sun costume.




The Gods of Wind and Thunder, Fujin and Raijin, are a difficult trial for even the most coordinated groups of warriors, and among the gods’ most sought-after treasures are their costumes, allowing anyone to become the embodiment of the wind and thunder itself.






Mushin’s Tower – Floor 8

The next floor of Mushin’s Tower has unlocked, and warriors capable of conquering the prior seven floors can now take on the three embodiments of Mushin himself. He has returned to take a personal hand in training those hoping to continue their ascension of the tower.



Mushin’s embodiments will use powerful techniques, and those challenging him will need to defeat each one separately against increasingly strict time limits. Among the great treasures he drops are the Fury weapon skins, and Mushin’s Soul Shield—an entirely new Soul Shield set. (a.k.a Endless Tower Soul Shield)





While Floor 8 completes the first section, it’s clear the tower continues to rise far above this floor, and it’s no doubt that more will be unlocked at some point, though no one knows when that may be.

+ Mini Information

8th floor of Mushin Tower will be unlocked. In this floor, there's 3 avatars of Mushin (a.k.a phase)

1st phase: Mushin's Grief
Time limit: 2min 30 sec

Drops: Mushin tower bopae, South Heaven silver coin
PS: There is a black stone being dropped, wich is the "Ghost Stone", a must-have material to get Legendary weapon

Special rewards: killed Mushin's Grief under 2min


2nd phase: Mushin's anger
Time limit: 4min 30 sec


Drops: Mushin Tower bopae, Mushin Tower gem box, Fury weapon box, Fury weapon
PS: Fury weapon is a material for Legendary weapon


Special rewards: killed Mushin's anger under 4min


3rd phase: The Dark Mushin
Time limit: 4min 30 sec


Drops: The Apostate Dobok

Special Rewards: killed The Dark Mushin under 4min






(Source : http://www.bladeandsoul.com/en/news/naryu-labyrinth-mushins-tower-floor-8/ + http://www.bladeandsouldojo.com/topic/70710-guide-for-mushin-tower-8th-floor-rewards/)​