Chaos Elgo Chaos Elgo is the final boss of " Final Fantasy Dimensions " . It is encountered in the World of Nil at the end of the game . Story . Once the heroes reach the throne room inside the World of Nil , they come across Elgo who reveals himself to have been the Emperor of Avalon all along . He harnesses the power of Nil to become immortal , but after the party defeats him , he is consumed by the power and turned into the monstrosity that is Chaos Elgo . The creature escapes between worlds through a dimensional portal with the heroes in pursuit . They face off with Chaos Elgo in the final battle , ultimately defeating him and saving the world . Battle . The battle starts off with Chaos Elgo using Grand Wall , which deals roughly 3 , 000 physical damage to a single party member . It will also use Eclipse to deal about 1 , 000 damage to the party and randomly add Curse and even Gradual Petrify . Sometimes Chaos Elgo will counter with Gravity . After dealing a sufficient amount of damage , Chaos Elgo will transform into its Dark form and cast Dark Flow , instantly putting the party in critical state . After a short cutscene plays , the heroes will be revived with their buffs intact ( and remove any possible status ailment ) . It is possible for Chaos Elgo to cast Black Hole , nullifying the status buffs . From this point on , Chaos Elgo will switch between three forms : the default form which uses physical and non - elemental attacks , the Dark form which uses Black Magic , status ailments and Dark - elemental attacks , and the Light form which heals and casts buffs on itself while unleashing Holy - elemental damage . The light and dark forms are resistant to their respective elements and weak to the other . At this point his attacks for the Dark form involve Meteor , Dark Flow which now damage the party for 2000 - 3000 damage and heal himself for 4000 , and Black Hole which dispels all buffs . For his Light form he can use White Form to buff himself with protective magic and heal himself for 5000 , Pandora ' s Box which like the previous fight give him access to Axion , Neutrino and Neutralino and Holy , which can inflict close to 3000 damage and above . His normal form will use Eclipse , may counter attacks with Gravity and use high level spells . Upon hitting half his HP , the boss will also use 10000 G ' s , which will reduce the entire party to single digit HP . When low on health , Chaos Elgo will begin to use Big Bang , which will deal around 4 , 500 damage to the party along with Sap . Strategy . Just like with regular Elgo , it is recommended the party be level 70 or above before attempting this battle . The battle will be long , so the player should ensure they have a good supply of Dry Ether and Elixir items . The Argy summon is helpful to counteract Chaos Elgo ' s Black Hole ability . The party should begin by casting as many status buffs as possible , then unleash the strongest attacks available . Coming with two healers ( preferably at least one Seer ) one with Hermes ' Sandals is of great help to guarantee keeping the healing up while the other healer buffs . Fusion Abilities like Mighty Wall , Hastega , Midareyuki , Final Heaven , Phantom Rush or Dance skill Sabre Dance all can be very helpful . The player should consider bringing a Paladin and a Dark Knight ( or at least two people with their skill sets ) due to Chaos Elgo ' s tendency to change forms thus making it viable to strike on his weakness point . If using the aforementioned jobs , one should be careful with equipping Light or Dark based equipment as they can heal Chaos Elgo in the wrong form , so using neutral equipment ( or changing it through the item command ) is a good alternative . Strike and Smash can both hit for solid damage , specially if buffed so that regardless of form , neither attacker is imperiled , otherwise the player can also use magical attacks like Comet , Flare , Meteor , Ultima or Bahamut all of which can deal high damage without worrying about elemental properties . Otherwise Dark Star and Holy are good ideas that can deal several thousands of damage to Chaos Elgo . If Chaos Elgo casts Black Hole and nullifies the party ' s buffs , it is recommended to recast Shell and Haste as a priority . Hermes ' Sandals cannot be dispelled so if equipped on the healer the player will have an advantage . If Chaos Elgo buffs himself with White Hole the Seer should be able to Dispel it as his defenses can drag the battle out longer than necessary . The player should always make sure a healer is ready to cast Curaga or Summon Argy or buff as Chaos Elgo will reduce the party ' s HP to single digits with 10000 G ' s which can be fatal if not healed quick and even worse if not buffed as he will likely follow with his strongest , Big Bang whose damage output can likely destroy an unhealed party . If possible Full Cure is an alternative to quickly revert this situation . Overall the battle is basically a longer version of the previous , with more tricky moves involves . The tactics used on the last battle should work here as well , and the player is only advised to be more careful to evade being wiped out by Chaos Elgo ' s attacks , gearing the difficulty of the battle on its longevity . Music . The song that plays during the battle with Chaos Elgo is titled " Inside the Swirl of Chaos " and was composed by Naoshi Mizuta .