Requiem (ability)

Requiem is a recurring ability in the Final Fantasy series.

Final Fantasy III
Requiem is an ability of the Sing command, accessible only by the Bard while equipped with the Lamia Harp.

It inflicts damage to an enemy equal to a percentage of their HP, which uses the following formula:
 * $$Damage Inflicted = Enemy's Current HP \times (10 + JobLv / 11)%$$

Final Fantasy Dimensions
Dire Dirge is a level 20 ability for the Bard for 490 AP, which deals damage equal to each target's Max HP minus their current HP.