This is done according to the formula:
- $ Damage = L/2 \times X^2 $
In the Zodiac versions it is:
- $ Damage = L \times X^2 $
In which $ L $ is the user's level and $ X $ is the second digit in the game clock's minute. Due to the nature of the formula, damage dealt from using Horology caps at 4,009 HP (8,019 HP in Zodiac versions) ($ 99/2 \times 9^2 $). The attack rarely misses and can be used multiple times within the minute. If used on multiple enemies, it will always hit one of them, even if blinded.
Horology's damage is actually determined at the moment the damage is inflicted. Even if the caster starts readying it during XX:47:55 and the damage is inflicted during XX:48:02, its damage is calculated during the damage. So, the damage calculation is:
- $ L/2 \times 8^2 $ instead of $ L/2 \times 7^2 $
Exploiting Horology is easy with by pausing during its charge time via the party menu. Once the second digit of minutes reaches nine, Horology's potency will be at its peak. However, using it consecutively can be tedious.
In the Zodiac versions, Horology can be bought from shops after the party returns from the Leviathan. In the original, it is available slightly earlier, from the technick shop in Bhujerba. It is also a treasure in the Trial Mode Stage 22 with Diamond Armlet.
Horology is the art or science of measuring time. Clocks, watches, clockwork, sundials, clepsydras, timers, time recorders and marine chronometers are all examples of instruments used to measure time.