Game: Final Fantasy V
Watch The Final Battle: Click Here
How To Beat Him: Omega's counterattacks will do you in, and the fact that he can spam a devastating range of other attacks--including one-hit kills--makes him even tougher than the final boss, Shinryu. Omega is weak against Bolt, so use Bolt 3 on your swords, then Sshot him if you're lucky. This still might not guarantee a win.