Aqua Ball (AquaBall in the PS version) is a 3rd-level Blue Element in Chrono Cross. This element summons a massive water droplet from water vapor in the air, the caster drops it atop the head of a target, causing moderate damage. Bubbles rise from the wreckage and blue rings span from the feet of the target once the water drop dissipates. This ability has a chance to inflict the Flu.
The Aqua Ball element can be found aboard the S.S. Invincible.