Elemental Gauge
Elemental Gauge is Black Mage's Job Gauge.
Elemental Gauge in PvE
The Elemental Gauge displays several different pieces of information vital to black mages, first and foremost being whether or not they are under the influence of Astral Fire (after casting a Fire spell) or Umbral Ice (after casting a Blizzard spell). All Fire spells cast while under the influence of Astral Fire will have increased potency, but will require more MP. This is the same for Blizzard spells cast while under the influence of Umbral Ice. Umbral Ice also increases the speed with which MP regenerates.
Executing Enochian while under the influence of either Astral Fire or Umbral Ice will add a bar to the gauge's lower-right corner. Enochian increases the potency of magic attacks, as well as unlocks powerful spells such as Blizzard IV. Enochian fades when Astral Fire or Umbral Ice expires.
Casting Blizzard IV grants a black mage 3 Umbral Hearts which are represented by the arrows in the gauge's lower-left corner. An Umbral Heart is consumed each time a Fire spell is cast, nullifying the MP cost increase applied by the Astral Fire status.
The Enochian bar will fill every 30 seconds the status is maintained. When the crystal at the bottom of the Elemental Gauge glows pink, the spell Foul (acquired at level 70) can be cast, resetting the timer.
Elemental Gauge in PvP
The Elemental Gauge displays several different pieces of information vital to black mages, first and foremost being whether or not they are under the influence of Astral Fire (after casting a Fire spell) or Umbral Ice (after casting a Blizzard spell). All Fire spells cast while under the influence of Astral Fire will have increased potency, but will require more MP. This is the same for Blizzard spells cast while under the influence of Umbral Ice. Umbral Ice also increases the speed with which MP regenerates.
If a black mage uses Enochian while under the influence of Astral Fire or Umbral Ice, they will be able to use either Fire IV or Blizzard IV. 30 seconds after using Enochian, black mages are able to use Foul. This then enables them to use either Flare or Freeze. The crystal beneath the Elemental Gauge will light up every 30 seconds when Foul can be used.