Valigarmanda has been freed, and you must aid Wuk Lamat and the others to stop it.
How to Unlock
Worqor Lar Dor, an 8-player trial, is unlocked by the level 93 Main Scenario Quest The Skyruin.
Defeat Valigarmanda
When the boss spins around the area with a spinning wind indicator, get in the middle of the arena to be inside of the safe circle.
When the boss becomes holds its front claws over the area, move away from the boss because it will do a circle attack centered on itself. The circle attack is larger than the boss's targeting circle.
When the boss opens its beak and absorbs energy into the beak, there will be a wide cone attack with the only safe zones in the northeast and northwest corners of the area.
Ice Talon targets both tanks with a high-damage attack that has an area of effect, so players should stay out of the circle markers. Those hit with the attack will get a Frostbite debuff that can't be removed with Esuna.
Skyruin - Avalanche
When the boss casts Skyruin with an image of an avalanche, everyone will get a Frostbite debuff that can't be removed with Esuna.
When the boss casts Avalanche, it is telegraphed outside of the area with arrows pointing at the battle area. A large line attack will occur where those arrows are pointing. Don't be where the arrows are pointing.
With Freezing Dust, you will be marked with a countdown. Keep moving until your make sure to move for multiple ticks until your debuff is gone to avoid being frozen.
There will be two ice circle markers with lines pointing out of them. There will be line attacks centered on each of those lines, so don't let any of the lines point at you.
Skyruin - Tornado
If the boss casts Skyruin with a picture of a tornado, the area will change, and everyone will get an Electrocution debuff that can't be healed with Esuna.
When the boss casts Thunderous Breath, stand on one of the glowing tiles to levitate above the attack.
Hail of Feathers places feathers in random locations, then Blighted Bolt targets random players with small circle attack markers. Players with circle attack markers should not levitate and should avoid overlapping their circles with other characters. Keep your distance from the feathers that appeared on the area, because they will each do a circle attack centered on themselves.
When there is a line of purple circles along one edge, look for a spot where there is no purple circle, and stand in front of that spot. The other purple circles will do line attacks.
Halfway Point
Ruinfall is a tower that only the tanks should stand in. This is combined with a knockback attack away from the boss. Make sure not to get knocked into any of the circle attack markers along the far edge of the area.
The boss will create three Beacons. These must be destroyed while dodging alternating cone attacks and staying stacked in a line with the player who has a stack marker.
After the beacons are gone, the boss will cast Tulidisaster, and there will be multiple attacks, the strength of which will depend on how much the boss's gauge increased.
Eruption targets random characters with circle attacks that follow them. Keep moving out of the attack markers.
Completing the Quest
Defeating the boss will complete one of the quest objectives for the Main Scenario Quest Worqor Lar Dor.