Ultima Weapon ( Final Fantasy VI boss ) Ultima Weapon , also known as Atma Weapon , is a boss in " Final Fantasy VI " . It is the strongest boss in the World of Balance and guards the Warring Triad at the summit of the Floating Continent . It was created 1000 years ago during the War of the Magi and was bred for mass destruction . Battle . The Ultima Weapon attacks in three stages . The first stage has it using its physical attacks and casting Flare and Blaze . Once Ultima Weapon reaches 12 , 800 HP , it starts out its next stage by casting Quake , Bio , or Meteor . Its next move is either a physical attack or its special attack , Full Power , which deals heavy damage to one target . Following this , it always casts Fira on the entire party . Then it uses Mind Blast , which chooses four random party members ( meaning the same party member may get targeted twice ) and inflicts a random status ailment on each . It then gives itself Protect , Shell , and Haste and begins charging energy for its ultimate attack , Flare Star . Flare Star deals unblockable , defense - ignoring Fire - elemental damage to all party members equal to eighty times a random party member ' s level divided by the number of party members . After Flare Star , the pattern repeats with Quake / Bio / Meteor . Ultima Weapon is immune to status ailments , except for Slow , which can buy valuable time for healing and / or attacking . When it prepares to use Mind Blast , it grants itself Haste , which will negate the Slow status . Once Ultima Weapon drops below 6 , 144 HP , it enters its third phase , in which it uses its physical attack , Tornado , Graviga , Rasp , and Blaze . It also has a 1 / 3 chance of countering any attack with Flare . This pattern repeats until Ultima Weapon is killed . Strategy . It is recommended to equip Gaia Gears , which allows Quake to heal the party and negates one of Ultima Weapon ' s strongest attacks . Edgar and Cyan cannot equip Gaia Gear , so the player should leave them behind on the " Blackjack " ; conversely , Locke should be considered , as he can steal a rare Ribbon . Mage - type characters , like Terra and Celes , are good , and Mog should Dance the Earth Blues , as it has strong attacks and can heal the party with Sun Bath . Physical characters should use their best attacks — Sabin should use Blitzes , Cyan use Bushido , Shadow can throw weapons , and Edgar can use the Chainsaw . Since the Ultima Weapon only uses its more dangerous attacks in the later stages of the battle , the player may wish to take a few turns to cast spells like Haste and Shell while Ultima Weapon is still using its weaker attacks . Summoning espers to strengthen the party can also be helpful , particularly Zona Seeker , since most of Ultima Weapon ' s attacks are magic . In its third battle phase , Tornado and Graviga greatly diminish the party ' s health , so the player should heal immediately after as Ultima may use Blaze and wipe out the entire party . A convenient strategy is to use Rasp and Osmose to deplete Ultima Weapon ' s MP , as it will die when its MP reaches 0 . Although this can take a long time , it leaves the beast ' s HP at its maximum value , and thus the party does not need to worry about the more dangerous attacks it uses when low on HP . It may be useful to equip Reflect Rings to all of the party members for this strategy , as this will reflect Ultima Weapon ' s Flare attacks , leaving only its normal attacks and Blaze to contend with . Music . The music used for the battle with the Ultima Weapon is " Battle to the Death " . The battle is the first time in the game the theme is used , and is reserved for particularly powerful boss - type enemies . Other appearances . " Final Fantasy Record Keeper " . Ultima Weapon appears in " Final Fantasy Record Keeper " as an enemy .