Deals damage to an enemy equal to the caster's current amount of HP loss.
Revenge Blast is a Lore spell for Strago, which could be learned from Dark Force, Dragon, Garm, Gigantos, Gilgamesh, Glasya Labolas, Kaiser Dragon, and Pandora, although Strago starts with this spell initially. It deals non-elemental damage to one target equal to the difference in Strago's Max HP and current HP at the cost of 31 MP.
Payback, known in the Japanese release as Revenge Blast, is an ability usable by Cinque. It does greater damage the lower her HP is. Uniquely, it also restores HP equal to damage dealt, making it similar to Vampire from prior games.
Revenge Blast is the summon attack of Wrieg's Kaiser Dragon Eidolon. It deals neutral-elemental damage based on Wrieg's current HP and lowers the attack, speed, and magic of all enemies for three turns.