How do you stop a metal demon? Explosive magic! Vivi's got that in spades, with the nonelemental magic that rips straight through Alhazad's defenses. Flare's just what's recommended for cooking overheated metal demons, along with a hefty dose of Doomsday. Zidane's best friend needs a little more than that to stop Alhazad, which he has in his Water spell. With a quick equip change before the fight, Vivi now absorbs water and can use that to heal with his Water attack spell. Superior speed and healing means he'll have all day to send Alhazad home crying to his Mother.