Since Roman times, people have associated the hand's fourth digit with the wearing of rings. In many cultures, a proportionally longer ring finger in men has been taken as a sign of fertility.
The ball explodes on impact, knocking enemies to the ground and dealing 1d3+3 fire damage per two caster levels (a successful Reflex save reduces the fire damage by half and negates the knockdown effect) and 1d2+2 force damage per caster level (no save) to targets in the area.
I used a party composed of Zidane, Eiko, Quina and Steiner but you can use any party that you want. Quina is useful because she can deal 9,999 damage with her frog drop blue magic and can also heal the party after Ozma casts curse and mini with her Angel's Snack Blue Magic. Steiner can use Shock to cause 9,999 damage.