Enthunder (ability)

Enthunder is a recurring spell in the series. A supportive spell, it usually bestows the Enthunder status, which imbues a character's attacks with the Lightning element, or adds a small amount of additional Lightning-type damage to them.

Final Fantasy XI
Enthunder is an Enhancing Magic white magic spell in Final Fantasy XI. When under the effect of Enthunder, the player or monster will deal some slight Lightning magic damage following each melee attack. Unlike most Final Fantasy games, ordinary melee attacks in Final Fantasy XI cannot have a specific element, and En-Spells do not change this.
 * Example:
 * Player attacks the Eft for 30 damage.
 * Additional effect: lightning damage: the Eft takes 12 damage.

Final Fantasy XIII
A Synergist spell, Enthunder can be learned by Sazh at level 4, as well as Lightning and Hope, both at level 7.

It adds the Lightning elemental property to physical attacks, and is thus particularly valuable against enemies that are weak to the element but strong against magical attacks.

Cast on Commandos, who get a bonus to physical damage, it is superior to the Sparkstrike used by Ravagers, if the time taken to cast it does not outweigh that consideration, such as in short battles.

Ravager party members with Enspell will do additional damage to all enemies within a short radius, similar to Blitz, Thundara, etc, when they perform the corresponding element of Strike.

Final Fantasy Dimensions
Enthunder is the level 5 ability of the Magus class, requiring 100 AP to learn. At the cost of 18 MP, the user will make the party's physical attacks Lightning-elemental.