Endark

Endark is a Dark Magic spell in Final Fantasy XI. When under the effect of Endark, the player or monster will deal some slight dark magic damage following each melee attack, and attack power is boosted. Unlike most Final Fantasy games, ordinary melee attacks in Final Fantasy XI cannot have a specific element, and Enspells do not change this.
 * Example:
 * Player attacks the Eft for 198 damage.
 * Additional effect: dark damage: the Eft takes 37 damage.