Ultimate Weapon ( Final Fantasy VII ) The Ultimate Weapon of " Final Fantasy VII " is one of the five Weapons created by the planet of Gaia as a defense mechanism and released from their slumber in the North Crater . Ultimate Weapon is optional other than the Mideel battle , but is worth fighting for the prizes it holds . Defeating Ultimate Weapon in the PC version re - release unlocks the Ultimate Weapon achievement . Storyline battle in Mideel . Ultimate Weapon attacks the village of Mideel while Cloud is recovering in the clinic and Cid ' s party is forced to fight it . After only a couple of rounds , Ultimate Weapon will flee and fly away . If the party is fast , they can steal a Curse Ring from it before it flees . Optional boss . Finding Ultimate Weapon . After Diamond Weapon ' s defeat , and with the party in control of the " Highwind " , Ultimate Weapon can be found above the water - filled crater near Junon . After the initial battle , it will fly away and the party is forced to chase it across the globe with the airship . Depending on where the player fights it , the battle will either be a ground battle or an aerial battle . If Ultimate Weapon is nowhere in sight after a battle against it , it will have respawned back at the Junon Crater . Ramming into it with the " Highwind " will eventually cause it to fly straight toward a particular location and stop — it usually takes around four hits to get it to settle a location . Although , one hit with Knights of the Round will cause Ultimate Weapon to lose enough HP to settle in Cosmo Canyon , saving the player trouble of chasing it around the World Map . Ultimate Weapon can only be defeated in Cosmo Canyon ; he will flee from every other battle . It is possible to steal a new item from him every time he is encountered : Reflect Ring in the ground battles , and Circlet in the aerial battles . However , in the aerial battles , a party member with Steal must also be wearing a Long Range Materia to get it . The following locations result in a ground battle : The following locations result in an aerial battle : When Ultimate Weapon escapes , its HP does not recover , and when it reaches 20 , 000 or less it will head to Cosmo Canyon where it can be defeated . If the player has reduced its HP to 0 in the previous battle it will automatically be restored to 20 , 000 for the last fight , but as long as Ultimate Weapon was defeated with more than 0 HP it will have the same amount of HP as what it had at the end of the last battle . Even the initial battle in Mideel counts towards its total and , due to this , it is possible to make Ultimate Weapon head straight for Cosmo Canyon after the first battle , if the party hits it with Knights of the Round . Doing so is not necessarily desirable , since it will deprive the player of the opportunity to steal Reflect Rings . After defeating Diamond Weapon , to continue the story the player must go to North Crater . If Ultimate Weapon appears over North Crater the player cannot avoid triggering the cutscene if trying to encounter it . To continue the story after watching the cutscene triggered over North Crater , the player must go over Midgar . If Ultimate Weapon appears over Midgar at this time , the player cannot avoid triggering the cutscene if trying to encounter it , and they will not be able to fight it again until Part 3 , after the Raid on Midgar events have finished . If one wants to defeat Ultimate Weapon before entering Midgar it is advised they load their save file if Ultimate Weapon settles on these areas at those times . Battle . Ultima Beam is Ultimate Weapon ' s strongest attack apart from the Shadow Flare it uses as a final attack , which does about 7 , 546 damage before taking damage randomization and character magical defense into account . The Ultima Beam is the only offensive attack in the game that is of the Hidden element ; by placing a mastered Elemental Materia in a character ' s armor , and linking it with certain non - elemental Materia , one can absorb the damage . Ultimate ' s other attacks include Bolt Ball , which , despite its name , is a Fire - elemental attack . During aerial battles Ultimate Weapon can only be attacked via long range attacks , so the player can equip the Long Range Materia to anyone not wielding a ranged weapon . If they do not have a long ranged weapon or a Long Range Materia they can use magic , summons and Limit Breaks . Defeat . Upon death , Ultimate Weapon will cast Shadow Flare on the character that dealt the killing blow , making this boss one of the few sources of the Shadow Flare enemy skill . Shadow Flare is fairly strong and if the character dies when it hits , the enemy skill will still be learned . However , if the spell is reflected it can be learned without taking damage . When defeated , Ultimate Weapon crashes to the ground creating a crater that allows the party access to the Ancient Forest without the aid of a chocobo . Following defeat , Cloud Strife receives his strongest sword , the Ultima Weapon , and the party can encounter Ruby Weapon in the sands surrounding the Gold Saucer . AI : Setup AI script . AI : Main AI : Counter - General AI : Counter - Death AI : Counter - 13 AI : Setup AI : Main AI : Counter - General AI : Counter - Death AI : Counter - 13 AI : Setup AI : Main AI : Counter - General AI : Counter - Death AI : Counter - 13 AI : Setup AI : Main AI : Counter - Death Other appearances . " Theatrhythm Final Fantasy " . Ultimate Weapon appears as a superboss under the name " Ultima Weapon " . " Final Fantasy Record Keeper " . Ultimate Weapon from " Final Fantasy VII " appears as an enemy in " Final Fantasy Record Keeper " . Merchandise . Ultima Weapon is part of Final Fantasy Creatures Vol 1 released in 2001 in Japan . The Final Fantasy Creatures collection figurines require minimal assembly and there are three types of every character : full - color , crystal , and chrome .