Speak with the Sky Dweller hovering above the square in Sunstream City (168, 108).
Defeat 10 Celestial Vanguards in the area which correspond with your LV.
Note: You must have at least 30 slots available within your Bag in order to hold all of the pieces.
Return to the Sky Dweller to obtain fragments of a treasure map and a random amount of currency (based on your character LV).
Reposition the treasure map fragments within your Bag until they are all aligned correctly.
Note: You have 60 minutes to decipher the location of the treasure before the fragments disappear.
Open your World Map and compare the map fragments to each area. Search for the region which contains an area resembling that which is displayed in the treasure map fragments.
Speak with the Sky Dweller and pay 10 Gold in order to obtain a treasure hunting charm.
Travel to one of the areas marked on the map and use the Treasure Charm.
Note: The treasure map fragments must be aligned correctly within your Bag and you must be standing in the precise location as indicated on the map.
If you are successful in your hunt, you will be awarded with a Gold Leaf...
If you are very fortunate, there is a possibility that you will uncover the Lost Treasure.
If you recover the Lost Treasure, quickly return the trove to the Sky Dweller in Sunstream City to have your pick from even greater treasures (such as EXP, gold, Honor, or a weapon) plus a unique title.
Note: Depending on the number of players who have attempted to locate the Lost Treasure, it may not be possible to return the object to the Sky Dweller - even if you were able to unearth it - as the quest may only be completed a certain number of times per day.