Chaos ( Final Fantasy boss ) Chaos is the final boss of the original " Final Fantasy " . Chaos is the toughest enemy in the game in the NES and " Origins " versions , and one of the toughest enemies in the " Advance " , " 20th Anniversary " , and mobile versions . Battle . Chaos ' s physical attack is powerful and has an added paralysis effect . He wields an array of elemental and non - elemental magic . As with all enemies , Chaos follows a strict spell cycle and a separate skill cycle . He casts the following spells in repeating order : And he will use the following skills in repeating order : His unique version of Blaze is a strong fire - elemental attack that is more powerful than any other monster ability of the same name . Tsunami and Cyclone deal heavy non - elemental damage and Earthquake is an earth - elemental instant kill . Chaos attacks primarily with the three elements of fire , ice and lightning , debilitating physical fighters with Slowra and increasing his physical capability with Haste , as well as healing himself to full health with Curaja . To finish off , he uses his most powerful attack , Flare . Strategy . It is wise to give three characters a Ribbon . In the NES and " Origins " versions , there are only three Ribbons , so one party member will have to make it without . It is recommended the player give the Ribbons to the mages . In the other versions , the player can get a fourth Ribbon , so one can give Ribbons to every party member . The Ribbons decrease the damage of most of Chaos ' s spells , as well as resisting the paralysis from his physical attacks and the instant death caused by Earthquake . Characters without a Ribbon should have NulAll cast on them by a White Wizard , or at the very least , NulDeath by a White or Red Wizard to avoid aforementioned paralysis and instant death . Protect Rings cannot block Earthquake as it is earth - elemental and not death - elemental . Slowra can be countered with Haste using either Ninjas , Black Wizards or Red Wizards . Chaos is resistant to every element and has high magic defense , so weapon strikes work the best . Knights , Ninjas , Masters and , if unneeded for healing , Red Wizards should all have Haste cast upon them . Temper should be used on the physical fighters unless the version being played is the original NES / Famicom where the spell is bugged . Physical fighters can use the Giant ' s Glove to boost their attack power even faster than with Temper , though if the party has casters who know Temper , they can buff and attack in the same turn . Buffing should be done up until Chaos casts Curaja , which is the party ' s cue to go heavily offensive before Chaos reaches Curaja again in his spell cycle . To help defend against Chaos ' s physical attacks , the party should utilize several casts of Invisira ( either cast by White or Red Wizards , or by using the White Robe item ) and Protera . Afterwards , White Wizards should focus on healing with Healaga to target the entire party . Without a White Wizard , high Intelligence characters , like the Black Wizard and Red Wizard , should use the Healing Staff and / or Healing Helms when the entire party needs to be healed . The Red Wizard can fall back to Curaga if only a single target needs HP restored . If a Black Wizard finished buffing and has a free turn , he can attack with Flare . If the party has few high Intelligence characters , it may be necessary to have three party members healing with the Healing Staff and Healing Helms and only one character focused on attacking . Other appearances . " Final Fantasy All the Bravest " . Chaos is fought in Cornelia ' s Tract . He uses Beatdown and drops the Bastard Sword upon defeat .