Element of Treachery (謀逆のアスペクト, Bōgyaku no Asupekuto?, lit. Aspect of Trickery) is a recurring ability in the Final Fantasy series. It is Balthier's trademark Quickening, first appearing as his level 3 Quickening in Final Fantasy XII. Its animation is similar to Delta Attack from Final Fantasy X.
Element of Treachery is Balthier's level 3 Quickening. As with all level 3 Quickenings, it deals damage equal to a random number between 1 and 230 multiplied by Balthier's Strength, and costs three Mist Charges to execute.
Element of Treachery is the Balthier I summonstone ability. Its Initial Brave is 2,938, Initial Charge is 57, Initial Level is 240, with SR Rarity, None Element, and Slow Leveling Rate.