For lore and background about the August Celestial, see Yu'lon.
Image of Yu'lon
Title <The Jade Serpent>
Gender Female
Race Cloud serpent (Beast)
Level ?? Boss
Reaction Alliance Horde
Location The Celestial Court, Timeless Isle [39, 55]
Status Defeatable

Yu'lon is a world boss in Timeless Isle, she represents wisdom and faith where the battle is based on this premise.


Main article: Yu'lon

Adventure Guide

The trial of Yu'lon is a test of wisdom and faith. With omens of a bleak future floating through his mind. Emperor Shaohao climbed to the summit of Mount Neverest to seek the council of the Jade Serpent. Yu'lon urged Shaohao to cast off the dark emotions that plagued him, and through his trials, Emperor Shaohao would become one with the land. To pass the trial of the Serpent, warriors must be wise in their choices.


  • Spell fire fireballgreen2.png  Jadeflame Buffet — Inflicts 8 Fire damage and increases Fire damage taken by 5% for 1 min.
  • Spell fire fireballgreen.png  Jadefire Breath Tank Alert — Inflicts 82 Fire damage to enemies within a 40 yard cone.
  • Spell fire ragnaros lavaboltgreen.png  Jadefire Bolt
    • Spell fire ragnaros molteninfernogreen.png  Jadefire Blaze — Deals 27 Fire damage to players within 11 yards every 1 sec.
  • Ability warlock infernogreen.png  Jadefire Wall Deadly — Summons a giant wave to the back area quickly moving to the other side, the player needs to get into an empty gap in the wall.


Yu'lon is generally seen as the most difficult of the four celestials, with high amounts of both tank and raid-wide damage, along with a deadly and hard to dodge mechanic in Jadefire Wall. Only one tank is required.

The tank may attempt to dodge Jadefire Breath by moving to either side while Yu'lon is casting. The Jade Serpent will periodically shoot Jadefire Bolts to the ground around her, creating Jadefire Blazes. These blazes can be somewhat hard to see against the green-brown ground of the arena, particularly when the graphics settings are on low. In addition, they spawn quickly with no cast time and little warning, so raid members should always be ready to move. The tanks should constantly be kiting Yu'lon around the arena to minimize threat of the Jadefire Blazes. While kiting, keep Yu'lon faced away from the raid to avoid damage from Jadefire Breath.

The Jade Serpent's most devastating attack is Jadefire Wall, summoning a giant wave of green fire that starts at the end of the arena where Emperor Shaohao is. The mechanic is similar to Sartharion's Lava Walls, with small gaps in the waves as the only way to avoid them. For this reason, the tanks should try to keep the combat to the other side of the arena to give the raid as much time as possible to get between the gaps.




Emperor Shaohao yells: Long ago, the jade serpent instructed me to purify my spirit and become one with the land. My doubts were vanquished.
Yu'lon yells: The lesson of true wisdom lies within you, dear heroes, and in the choices you make. When faced with overwhelming darkness, will you make the right decisions?
The trial begins!
Jadefire Wall
  • Listen to your inner voice, and seek out the truth.
  • Do not let your judgement be clouded in trying times.
  • Always consider the consequences of your actions.
Killed a Player
Learn from your mistakes.
Yu'lon yells: Your wisdom has seen you through this trial. May it ever light your way out of dark places.
Emperor Shaohao yells: You have walked the trial of wisdom, and learned of the path of the jade serpent. May you learn from this lesson as I did.

Patch changes

  • Mists of Pandaria Hotfix (2014-04-07): All world bosses in Mists of Pandaria are no longer tap-to-faction. Players from both factions that engage the world boss at the same time are now eligible for loot.
  • Mists of Pandaria Patch 5.4.7 (2014-02-18): Celestials now drop Season 15 Prideful Gladiator gear in place of Season 14 Grievous Gladiator gear.
  • Mists of Pandaria Hotfix (2013-12-02): The Celestials (Chi-Ji, Niuzao, Xuen, and Yu'lon) have their health reduced to 25% of original health. If more than 10 players from the same faction are engaged with the Celestial, their health will scale up. The health increase will cap at 100% of their original health with 40 players.
  • Mists of Pandaria Hotfix (2013-10-03): Yu'lon now launches 5 Jadefire Bolts (down from 10).
  • Mists of Pandaria Patch 5.4.0 (2013-09-10): Added.

External links