Ultima Weapon ( weapon ) The Ultima Weapon , also known as Atma Weapon or Caladbolg , is a weapon in many games in the " Final Fantasy " series . Like the spell , the Ultima Weapon is one of the strongest in the game and often serves as the ultimate weapon of the main protagonist . It generally takes the form of a two - tone blue sword with gold hilt , but has also appeared as a dual blade , gun , or gunblade . Since its debut in " Final Fantasy VI " , the Ultima Weapon has appeared in almost every game in the main series , including remakes of earlier games . The Ultima Weapon draws its power from the wielder — the weapon grows in strength as the user gains HP , making it powerful in the hands of higher - level characters . Acquiring the Ultima Weapon usually requires the player to defeat an optional boss or acquire rare items . Appearances . " Final Fantasy " . The Ultima Weapon appears in the " " and subsequent remakes . Besides the Masamune , it is the only weapon that can be equipped by all upgraded classes . Its damage is based on the user ' s HP , having a maximum Attack power of 100 ( rounded up from 99 . 9 ) . It is obtained in a treasure chest after defeating Death Gaze in Whisperwind Cove . " Final Fantasy III " . The Ultima Weapon can be obtained in the 3D remake versions . It is a reward from the Mognet sidequests " Fix Sara ' s Pendant " and " Find Orichalcum " . The party obtains the Orichalcum after defeating Aeon in Cid ' s basement and give it to the Legendary Smith in Falgabard . The Ultima Weapon can be equipped by the Freelancer , Warrior , Knight , Dark Knight , Red Mage , and Onion Knight classes . When equipped , it boosts all stats by 15 , rivaling the stat boost of the Celestial Gloves , and has an Attack bonus of 155 , making it the second - most powerful weapon in the game after the Onion Sword . In the Windows Phone and Steam versions an achievement can be gained for obtaining the Ultima Weapon , named " One Sword to Slay Them All " . The is dropped by the boss of the same name . Unlike other incarnations of the weapon , it takes the form of a modest , dark blue iron sword . It has an Attack power of 180 , and gives + 10 to Strength , Speed , and Stamina . Cecil , Golbez , Ceodore , and Kain can equip it . In the 3D remakes , the Ultima Weapon now drops from Lunar Bahamut , due to the removal of the Ultima Weapon boss . It is the strongest sword , carrying the same parameters from the original versions . The Ultima Weapon ' s design in the remake is now based off the weapon ' s design from " Final Fantasy VI " . " Final Fantasy V " . In the Game Boy Advance and mobile versions , the Ultima Weapon is found in the monster - in - a - box containing Neo Shinryu . It is the strongest weapon with an Attack power of 177 , a Hit Rate of 180 , and it increases Strength , Speed , and Stamina by 2 . It can be equipped by any class that can equip swords , such as Knight , Mystic Knight , Cannoneer and Blue Mage . " Final Fantasy VI " . The original appearance of the weapon , the Ultima Weapon ( originally translated as Atma Weapon in the SNES and PlayStation releases ) is found in the Cave to the Sealed Gate . A second Ultima Weapon can be stolen from Rest during the final battle . Ultima Weapon is incompatible with Bushido , Runic , the Gauntlet , or the Merit Award , and it cannot be thrown . Terra , Locke , Edgar , and Celes can equip it . Unlike most incarnations of the weapon , the Ultima Weapon is given a backstory : The Ultima Weapon was created during the War of the Magi as a magical weapon said to reflect the power of who wields it . It is said to have been created around the same time as the magical beast that shares its name . Although it has an attack power of 255 , its damage is calculated differently than most weapons : the damage is based on the level of the character who is equipping it , and his / her current HP level compared to his or her max HP . When HP is high , the Ultima Weapon deals a large amount of damage . When HP is low , it deals a small amount of damage . The sprite used for the Ultima Weapon in battle is a glowing blue sword of varying length . The higher the damage dealt is , the longer the sword is . At its max power , the blade is longer than the user , and leaves an afterimage effect when swung . The weapon ignores the target ' s defense when calculating damage . The damage for Ultima Weapon is calculated as follows : The length of Ultima Weapon length is determined by the damage dealt : Ultima Weapon is one of the weapons affected by the Capture glitch and is the only means of dealing damage to petrified allies . " Final Fantasy VII " . The Ultima Weapon is Cloud ' s ultimate weapon received after defeating the Ultimate Weapon . It is the strongest weapon with an Attack power of 100 , a Hit Rate of 110 , and it grants + 24 Spirit and + 51 Magic . It has eight Materia slots in four linked pairs , but has zero Materia growth . The damage the Ultima Weapon deals depends on Cloud ' s current HP in relation to his maximum HP ; the higher it is , the greater the damage dealt . The sword ' s graphic changes depending on Cloud ' s HP , from a dark blue and purple when weak , to a bright blue and white when he is at full health . Damage formula : " Dirge of Cerberus - Final Fantasy VII - " . The Ultima Weapon is a handgun , visually indistinguishable from Cerberus , Vincent Valentine ' s weapon of choice . It is a modified version of the Model Gun , a gag weapon found in Edge , however , it requires 200 , 000 gil to modify into the ultimate form . This particular weapon fires standard handgun bullets , but deals more damage the more hits the player lands , similar to the way the machine gun does increased damage . It is considered Vincent ' s best gun . " Final Fantasy VIII " . The optional boss Ultima Weapon carries a sword similar to Cloud Strife ' s Ultima Weapon in " Final Fantasy VII " . Squall Leonhart ' s strongest weapon , the Lion Heart , also possesses similar traits to the traditional Ultima Weapon blade , such as a bright blue blade . " Final Fantasy IX " . The Ultima Weapon is a thief sword and Zidane ' s ultimate weapon acquired during the Chocobo Hot and Cold sidequest , by using a Dead Pepper on the ruins of the Shimmering Island ( disc 4 ) . It is the second strongest weapon in the game after the Excalibur II . The Ultima Weapon has an Attack power of 100 and has the Sleep status to inflict on enemies with Soul Blade . It teaches the Flee command . " Final Fantasy X " . Ultima Weapon is the original Japanese name for Tidus ' s Celestial Weapon , also used for the Italian , French , Spanish and German versions ; however , it was renamed to " Caladbolg " in the the English localization . It deals more damage the more HP Tidus has in comparison to his maximum HP . After upgrading it with the Sun Crest and Sun Sigil items , it contains the abilities Break Damage Limit , Triple Overdrive , Evade & Counter , and Magic Counter . Like the other Celestial Weapons , the Caladbolg will ignore the target ' s Defense when calculating damage . " Final Fantasy X - 2 " . Yuna wields Tidus ' s Caladbolg when donning the Dark Knight dressphere . " " . The is Vaan ' s weapon obtained by defeating Zodiark in the Well of Whispered Oaths . Though it is his best weapon under normal circumstances , other weapons can exceed its power if they are forged with the highest quality materials , and Anastasia can be repeatedly charged by defeating Yiazmat at the end of Midlight ' s Deep , eventually surpassing the Ultima Weapon . It has Attack power of 100 , Magic Attack of 50 , and Speed of 60 and boosts all stats by + 15 . It uses a generic sword sprite during battle . " Final Fantasy XIII " . The Ultima Weapon is a model of gunblade used by Lightning . It is obtained by transmuting Lionheart using a Scarletite . The weapon isn ' t among the ones with the highest of stats , but it has the passive ability Quick Stagger , which allows Lightning to stagger an enemy when the Stagger Gauge is at least 90 % full . It belongs to the Gestalt synthesis group . Unlike other " Final Fantasy " titles , the Ultima Weapon is not the ultimate form of the weapon , as it can still be upgraded into the more powerful Omega Weapon . Lionheart is bought from Plautus ' s Workshop for 28 , 000 gil or found in Eden in chapter 12 . At max level it dismantles into Ceramic Armor ( x7 ) and a Uraninite . The is obtained by Lightning if she completes all four trials in the Luxerion Cathedral before facing Bhunivelze , which also give her four powerful elemental spells . It is a restored and upgraded version of her initial weapon , , which was damaged by Lumina in the opening . It provides + 2500 to strength and magic , + 15 ATB speed , and has the auto - ability , which boosts damage for Army of One . The shield is also upgraded to the in the same event . Obtaining the ultimate equipment earns the achievement . While most equipment carries over into New Game Plus , the Ultima Weapon and Shield revert to their basic forms on starting another playthrough . " Final Fantasy Crystal Chronicles " . The Ultima Sword , Ultima Lance , Ultima Hammer , and Ultima Maul are each the second - strongest weapon for their respective characters , all created by finding the Greatest Weapon scroll , and then obtaining Ultimite and Orichalcum so they can be forged . All the " Ultima " weapons have an Attack power of 35 . Though each character has a weapon stronger than their " Ultima " weapon , its true strength lies in its ability to make enemies flinch with every strike . Ordinarily , one would have to pull off a three - hit attack combo to make the foe flinch , or use a charge attack . With the Ultima Weapons though , the player could use simple combo strikes and the enemy would flinch with every hit , leaving the player free from being struck back . The Ultima Sword , Hammer , and Maul posses the same Focus Attack skill as the weapons born from the novice weapon scroll , but the Ultima Lance has the same Focus attack as the Dragon Lance . The Ultima Weapon is a Clavat exclusive weapon , and the strongest sword . It has an Attack power of 127 at level 1 and 157 attack at level 30 , and has one empty slot . It can be obtained as a drop from Larkeicus in the final battle on Hard and Very Hard mode , and then created for 1 , 800 gil by using Abyssian x3 , Adamantite x3 , and Wandering Soul x2 . When turned into a jewel , a level 3 - 9 Ultima Weapon makes a Spirit Moonstone , level 10 - 19 makes an Extreme Mania , and level 20 - 30 makes a Gigas Eye . " Final Fantasy Dimensions " . The Ultima Weapon can be obtained by defeating Ω Weapon in the Gladiators ' Hall , and selecting the Ultima Weapon from the various weapons and items in the room that Ω Weapon guards . The Ultima Weapon can be equipped by the Jobless , Warrior , Red Mage , Dragoon , Dark Knight , Paladin , and Memorist jobs . It has and ATK stat of 117 , and allows the wielder to break the damage limit . " Dissidia Final Fantasy " . The Ultima Weapon is a level 99 weapon that can be equipped by all characters . It increases Attack by 68 , and when the character ' s HP is at its max , it increases all stats by 2 . It can be traded for with 31 , 920 gil , the Pisces Recipe , Noah ' s Lute , and Whisperweed . Cloud and Tidus equip their respective Ultima Weapons in their EX Mode s , but in keeping with " Final Fantasy X ' s " translation , Tidus ' s weapon is called the Caladbolg . As an effect of the weapons , in their EX Modes Cloud and Tidus deal more Brave damage the higher their HP is . Cloud also gains the ability to pierce blocks with his melee attacks , while Tidus gains an increase in duration of invincibility during his dodges . " Dissidia 012 Final Fantasy " . The Ultima Weapon returns as the EX Mode weapon used by Cloud and Tidus . It is also available as an equippable level 100 weapon with the same effects and trade accessories needed to acquire it , though the trade price has gone up to 182 , 800 gil . " Final Fantasy All the Bravest " . Ultima Weapon ( " Final Fantasy VI " version ) grants + 8 to Attack . It can be equipped by Knight , Mystic Knight , Cecil , Bartz , Cloud , Squall , Seifer , Steiner , and Vaan . Ultima Weapon ( " Final Fantasy VII " version ) grants + 10 to Attack . It can be equipped by Knight , Mystic Knight , Cecil , Bartz , Cloud , Squall , Seifer , Steiner , and Vaan . Non - " Final Fantasy " guest appearances . " Kingdom Hearts " series . The Ultima Weapon Keychain is usually the strongest Keyblade usable by the protagonists ( until " Kingdom Hearts Final Mix " and " Kingdom Hearts II " it is usually eclipsed by other Keyblades with stronger stats in other specific aspects ) . It is typically a gold , white , and blue Keyblade with swirl designs along its length , but unlike other recurring Keyblades in the series , the Ultima Weapon changes appearance in each game , its original design only being reused in " Chain of Memories " and " Re : coded " . The most notable trait regarding the Keyblade is that it uses the Dream Sword as its base ( which is one of the starting weapons in the series ) , save for its appearance in " Kingdom Hearts II " ; later games afterwards instead combine both the usual designs via the sword - base in tandem with its blue - based color scheme , while the keychain charms used often vary . The Ultima Weapon is usable in all games in the series except for ' and ' . One of Roxas ' s strongest weapons is the Omega Weapon , alluding to the connection between the enemies Omega Weapon and Ultima Weapon , and it bears three abilities that increase Roxas ' s power when he is at full HP , alluding to the Ultima Weapon ; unlike the Ultima Weapon however , it does not use a sword as its base . There is also an ability called " Ultima Weapon " that grants the player an additional 15 strength to any weapon they wield . " Blood of Bahamut " . Ultima Weapon is a greatsword that can be equipped by Ibuki .