Serpent's Bite is a whip ability in the Dragon Quest game series. The whip transforms into a serpent that attacks an enemy group.
Jessica can use Serpent's Bite after allocating 100 skill points into her whip skill. The strikes deals double damage, and carries the rock/grapple element.
Serpent's Bite can be used by any character that has the 'Working with Whips' (quest #74) item in their inventory.