Allagan Tomestone of Mendacity
“Though they appear to be naught more than simple stones, Garlond Ironworks engineers insist they contain reams of invaluable information on untruths gathered by the lost Allagan Empire.
— In-game description

Allagan Tomestone of Mendacity was a type of Allagan Tomestone introduced in Patch 4.2. They dropped from level 70 dungeons, trials or raids. They could not drop before the player's class is at level 70. You cannot spend them before completing Stormblood.
Allagan Tomestones of Mendacity were discontinued in Patch 5.0 with the launch of Shadowbringers. They could be exchanged with Auriana in Revenant's Toll (X:22.7 Y:6.7) for Allagan Tomestone of Poetics until Patch 5.2.
- Players could carry a maximum of 2,000 Allagan Tomestones of Mendacity.
- Players could only receive Allagan Tomestones of Mendacity after reaching level 70 with at least one class or job.
- Speak with Enna in Rhalgr's Reach (X:13.8 Y:11.6) to exchange Allagan Tomestones of Mendacity.
- Speak with E'bolaff in Rhalgr's Reach (X:13.6 Y:12.2) to enhance gear received in exchange for Allagan Tomestones of Mendacity.
Uses
Allagan Tomestone of Mendacity were used to purchase Item Level 360 gear in Rhalgr's Reach. They were used to purchase:
Others
Trivia
The word "Mendacity" means lies, deceit, falsehood, dishonesty, etc. It is derived from the Latin word "mendax", which means "liar".