Deal one very fast physical attack to one target, temporarily lowering its Defense a large amount.
In the International Zodiac Job System version, it can be found in the Lhusu Mines where the Antlion is fought. It can be used by Monk and Foebreaker, and also Uhlan, but only after acquiring the Esper Ultima's license. Vossler, in both times he joins as a party guest, can use the technick.
Expose is a Burst Mode attached to Ark Blast and replaces the Defend command. It is a Support-type ability with charge time of 0.83 seconds, which deals physical damage equal to 200% potency to one enemy and reduces its Defense by 40% for 15 seconds.