High Thunder II

Acquired: BLM (actions)
Level: 92
Type: Spell
Casting: Instant

Recast: 2.5s (GCD)
Range: 25y
Radius: 5y

AoE Type: Targeted Circle
Targeting: Enemy
Patch: 7.0

“

Deals lightning damage with a potency of 100 to target and all enemies nearby it.
Additional Effect: Lightning damage over time
Potency: 40
Duration: 24s
Can only be cast while under the effect of Thunderhead, granted when gaining Astral Fire or Umbral Ice from an unaspected state, or changing between their influences.
Only one Thunder spell-induced damage over time effect per caster can be inflicted upon a single target.

— In-game description

High Thunder II is an action unlocked at level 92. It is available for Black Mage.