This event ran from April 24, 2023 to May 22, 2023, and is no longer available to players. Any associated rewards can no longer be acquired through this event.
The information in this article is kept and maintained for historical purposes.
Square Enix reserves the right to bring back this event and any associated rewards at any time, or make the rewards available from alternate sources.
It gives us great pleasure to announce the return of the Moogle Treasure Trove! Collect irregular tomestones of mendacity by completing specific duties and exchange them with Itinerant Moogles for a host of treasures including accessories and mounts. Seek out those tomestones and reap the rewards!
This time, porxie earrings make their debut as a redeemable item, so don't miss this phenomenal opportunity to pluck up some pretty piggy perks!
— Event description
Moogle Treasure Trove: The Hunt for Mendacity is a special event that took place from April 24, 2023 to May 22, 2023.
Objectives
Duties associated with this event will feature a moogle icon in the Duty Finder.
Irregular tomestones of mendacity will be awarded upon completion of specific duties.
Note
Irregular tomestones of mendacity will not be awarded when using adventurer squadrons or the Duty Support system.
Irregular tomestone of mendacity rewards are only available to unrestricted parties if the "Level Sync" option is applied.
[1] -Will become available for exchange once you have completed the main scenario quest The Ultimate Weapon.
[2] -Will become available for exchange once you have completed the quest Triple Triad Trial.
[3] -Will become available for exchange once you have completed the quest Feel the Burn.
[4] -Will become available for exchange once you have completed the quest The City of Lost Angels.
[5] -Will become available for exchange once you have completed the main scenario quest The Face of War.
Items in bold text can no longer be acquired from their original source, or are exclusive to this event.
Items in italics have a low drop rate, require lots of grinding, require performing a difficult task, are expensive, or are otherwise difficult to acquire outside this event.
In recent years, demand from collectors and historians has led to a surge of adventurers seeking tomestones, those mysterious relics of the Allagan Empire made to record and keep its secrets. Some small number of the artifacts, unique for the peculiar sort of knowledge contained within, have piqued the interest of the eccentric─in particular, itinerant moogles, who come bearing rare goods of their own to exchange for these "irregular" tomestones.
The Ultimate Weapon.
Triple Triad Trial.
The City of Lost Angels.
Alexander - The Fist of the Father is an efficient choice for farming in Duty Finder with a regular party or with a premade party of 
Blue Mages using the correct spells for burst damage.
The Tam-Tara Deepcroft (Hard) is relatively efficient with Blue Mages with the correct spells. A guide can be found here.
