Ozma is a mega-difficult extra
boss in the popular
RPG,
Final Fantasy IX. After riding your
chocobo around the world, searching for
hidden treasure, you can ascend to Chocobo's Air Garden in the sky. There, you can find Ozma, a giant, badly-textured rotating sphere, who releases hell among your party.
An interesting boss because the battle system in FF9 is relatively simple, the most damaging attack it can release is usually Curaga on itself, since it sets the whole battle back a lot. Of course, the rewards for battling Ozma are rather small - you get Pumice, which is a stone that can be used to learn the most MP-expensive (yet pretty useless) summon, Ark.