Exodus from FFXII
Most ancient of the scions, created in opposition to Halmarut, the Arbiter, and scion of light. Tasked with keeping watch over the world, with the authority to judge the value of all things. As he watched, unseen, unknown, his attachment to the world dwindled and faded until it was as nothing. Fitting that he would desire to make the world, too, as nothing. Yet he fell in the war against the gods, and was thwarted, imprisoned in punishment for his heresy.
Exodus's final attack is difficult to use. It only occurs at the end of his summon time, and only if he has been immobilized. Keep a close eye on his HP and the time remaining, and cast "Immobilize" on him at the last second when enemies are near to trigger his meteor attack. It can be devastating, but requires careful timing.