Fusion Swords The Fusion Sword are a six - piece sword assembly wielded by Cloud Strife . The base sword and the others in its set are used by Cloud as his preferred weapon in " " , the sequel film to " Final Fantasy VII " , as well as in a handful of spin - off titles . As a set of six swords , the fusion swords come in a variety of shapes and sizes and are thus suited to a variety of combat situations , and can combine to a single large sword similar in size and function to Cloud ' s famous Buster Sword . This variety of uses and blades give the swords an array of uses by combining and separating different blades to suit the fighter ' s needs . The First Ken ( ) , or First Tsurugi , is the blade that forms the base of the six - piece sword . The film ' s creative designer , Takayuki Takaya , has stated the individual swords have no names , and no other names for them have been put forth by the creators other than " fusion swords " which was used during development . Due to a misunderstanding of a transcription of Tetsuya Nomura ' s words in the DVD commentary the fully assembled form came to be called First Tsurugi ; this was actually in reference to the main blade , and was originally called " ken " , not " tsurugi " . The swords . The fusion swords are composed of six separate swords that assemble into a single large sword . The fusion swords in their various states of combination serve as Cloud ' s primary weapon in " Final Fantasy VII : Advent Children " . Barring the First Sword the individual swords are not named , but they otherwise can be distinguished by their distinctive appearances and functions . The fusion sword consists of one main blade , the First Sword , one hollow blade that serves as the front edge , two identical ( but asymmetrically opposite ) blades that form the back , and two identical ( also asymmetrically opposite ) smaller blades that attach to the sides . The swords in their disassembled state are usually stored in racks inside the special compartments ( three racks per compartment ) on both sides of Cloud ' s motorcycle , the Fenrir . Cloud wears a harness on his back where he carries the swords . Though the harness is never shown fully occupied it is made up of four sleeves or holsters , which seems strange considering there are six swords . It could , however , imply that Cloud would never be in a situation where all six blades need separate carrying , as Cloud is only ever shown with a maximum of three at any given time ( e . g . one blade holstered , another blade in one hand and the main blade , possibly fused with some of the other blades , in the other hand ) and leaves the rest in the Fenrir . It is also possible that , given the need to carry all six blades , the two back blades and the two crest blades ( which mirror one another in each given pair ) might fit into the same sleeves ; as there are only four different blades in that case , this would solve the six blades / four slots problem . Main blade . The main blade , given the nickname of First Sword by Nomura in the DVD commentary , resembles an exaggerated two - handed sword in its shape and appearance , though Cloud usually wields it with one hand , invariably his right one , despite its apparent size and weight . It consists of a long hilt wrapped in a red material , a distinctively large handguard which the other swords are locked into , a wide length of blade , and an equally long but thinner length ending in a point . The main blade is the only sword among the six that is double - sided . The main blade has two forms . In the first , the appearance is as described above , with the blade one solid length of metal except for the transition between the wide and thin halves . In the second , the blade is pulled in two lengthwise ; the edges are locked apart and the sword ' s complex inner portion is visible , giving the blade an appearance not identical to , but reminiscent of , Cloud ' s Apocalypse sword from " Final Fantasy VII " . The main blade , by itself and as other swords are attached , is Cloud ' s main weapon , although he uses the other blades sans main blade as well . Cloud can use his Blade Beam Limit Break using only the main blade . Hollow blade . The hollow blade does not have an inner core as expected for a sword . Rather , it is essentially ( though not exactly ) a thick sheet of metal folded in a V - shape when looked from above , the sword ' s edge being the bottom point of the " V " , with its lower one - third of its length wrapping around a red double - hilt . The hollow blade is locked onto the main blade ' s front edge , where it snugly covers the entire edge of the main blade , and its own edge serves as the striking point for the assembled sword . It is this addition that turns the completed construct from a symmetric shape to the distinctive Buster Sword appearance . The hollow blade , while not Cloud ' s primary weapon , was capable of serving as such when Cloud was deprived of the main blade in the battle at the Forgotten Capital against Yazoo and Loz . Despite its lack of an inner core it is strong and sturdy enough to deflect and block bullets from Yazoo ' s Velvet Nightmare handgun and Loz ' s physical attacks . After regaining the main blade , Cloud uses the hollow blade as an off - hand weapon . He ejects the hollow blade from the completed blade as an off - hand weapon during the fight with Sephiroth , where it again demonstrates its strength by fending off Sephiroth ' s Masamune as well as slicing up falling debris . The hollow blade can also serve as a projectile weapon , ejecting it from the main blade by swinging it . Back blades . The back blades are identical long swords , mirror images of each other , with one straight edge and one saw - toothed edge , with a long black hilt for each . The two swords are attached to the main blade ' s back , on both sides of the main blade ' s back edge , with the saw - teeth pointed forward toward the hollow blade . The addition of these two swords completes the fusion swords ' trapezoidal silhouette . Cloud used the two blades in the fight against the Bahamut SIN . One was an off - hand weapon to complement the connected main and hollow blades ; the blade ' s saw - tooth edge is the striking edge , and Cloud wielded it until he attached it to the main blade in preparation for the Braver Limit Break . The other blade was carried on his back harness until it was attached in the same battle in preparation for the Climhazzard Limit Break . Side blades . The side blades are identical mirror image dagger - like swords , though they are long . They are single - edged , with a gear - like mechanism between the hilt and the blade that allows them to fold up like a switchblade . In the folded form the two side blades lock onto the two sides of the assembled sword , with their edges turned forward toward the main blade at the sword ' s front . One of the two blades can be quickly ejected from the assembly if needed , providing Cloud with a needed off - hand weapon as was the case in the highway battle and his battle with Kadaj . As part of the assembled fusion sword the side blades do not appear to have a vital function like the rest of the swords , possibly only adding extra mass , and therefore force , to strikes , and providing a decorative appearance . The side blades may also possess a locking mechanism designed to hold the other blades in place , or be meant to cover the hilts of the other blades to the same effect . It is also possible the blades are merely to add more strikes to Omnislash Version 5 , or to provide an efficient secondary weapon without compromising the assembled construct ' s strength . Completed Fusion Swords . As mentioned before , with the locking of the five auxiliary blades into the main blade as detailed in the diagram , the assimilated fusion swords take on the distinctive appearance of Cloud ' s iconic Buster Sword . Unlike the Buster Sword , which contains two round slots , the completed assembly bears no slots as the individual swords fit into a holster on Cloud ' s back . The fusion swords ' assembled form , much like the Buster Sword , is a heavy sword most suited to crushing , and is not necessarily intended to serve the role of a slicing weapon as a nodachi , such as Sephiroth ' s Masamune . Cloud does use it , however , to slice through reinforced concrete . Although its appearance is as stout and sturdy as the Buster Sword ' s , Cloud does not demonstrate any more difficulty carrying and wielding it with one hand than he does using only the lighter main blade by itself . The completed assembly does not appear any more or less durable than Kadaj ' s Souba ( a tasseled double - katana ) or Sephiroth ' s Masamune , neither damaging nor being damaged by repeated full - strength edge - to - edge blows between either , which would damage a real sword ' s edge if not outright break one or both . The completed assembly sans side blades can cut through Yazoo ' s Velvet Nightmare gunblade and Loz ' s Dual Hound pile bunker , which the main blade alone could not do . Limit Breaks . Cloud performs most of his original Limit Breaks with combinations of the various swords . He uses Blade Beam with the main blade alone during the battle at the Forgotten Capital , and performs Climhazzard and Braver with the main blade with various other swords attached while fighting Bahamut SIN . To defeat Kadaj , Cloud uses Finishing Touch with all six swords combined . Against Sephiroth in " Final Fantasy VII : Advent Children Complete " Cloud performs Omnislash with the completed assembly . However , as in " Final Fantasy VII " where any Limit Break could be performed regardless of the character ' s weapon , there is no link between the number of swords combined and the ability to use certain Limit Breaks . Omnislash Version 5 . In " Final Fantasy VII : Advent Children " Cloud performs the new Limit Break " Omnislash Version 5 " . The name comes from it being the fifth version of the new Limit Break designed for the movie , the other four being prototypes that were eventually scrapped . The technique is a succession of six slashes using the fusion swords . It is significantly different from the Omnislash in the original game , which used a single sword for a longer sequence of fifteen slashes . Within the film the technique is performed on Sephiroth who is floating in mid - air ; it is unknown how the technique would look performed on a grounded target . Version 5 is performed according to the following steps : Omnislash Version 6 . In " Final Fantasy VII : Advent Children Complete " , Cloud defeats Sephiroth using a different version of Omnislash Version 5 . No official name has been used for this new attack , but fans have dubbed it " Omnislash Version 6 " in - line with the naming of the original . Compared to the original Version 5 , this version is a longer sequence of thirteen slashes . Cloud attacks using the auxiliary blades eight times , and four of the energy silhouettes attack as he dives down for the final slash . Cloud glows blue as he does when performing his other Limit Breaks , rather than glowing gold as he did when using Version 5 in " Advent Children " . Like the original Omnislash Version 5 , Cloud must have all pieces of his fusion sword intact to use it . Version 6 is done by the following steps : Concept . In the " Reunion Files " book for " Final Fantasy VII : Advent Children " , Tetsuya Nomura joked about choosing to give Cloud six swords due to the comments that had been made over the Buster Sword ' s size ; " people joked that since Cloud went with size last time , he should go with sheer numbers this time " . The original idea was for Cloud to have six individual swords he would carry on his back , and the concept was modified for six interlocking swords . At the time the concept was originally put forth it was thought impossible for the idea to actually be executed , but proved to be an interesting twist to the story and its fight scenes and so was put into place . Prior to the sword being designed , Cloud ' s scenes were made with him still utilizing the Buster Sword , as seen in various shots of the movie ' s early footage . Other appearances . " Dirge of Cerberus - Final Fantasy VII - " . Cloud wields the main blade during the assault on Midgar , and uses it to battle Rosso the Crimson . " Dissidia Final Fantasy " and " Dissidia 012 Final Fantasy " . While wearing his alternate outfit from " Final Fantasy VII : Advent Children " , Cloud wields the main blade as his weapon , and wields the completed assembly as his weapon in EX Mode . In his alternate outfit , the fusion swords glow blue when Cloud uses an HP attack similar to the way they glow in " Advent Children " , as opposed to Cloud ' s normal outfit where the Buster Sword glows orange . Cloud performs a variation of Omnislash Version 5 in any outfit . For gameplay purposes ( as Cloud does not usually have access to all of the fusion swords ) , the attack involves Cloud dashing past a mid - air opponent five times , then leaping up and diving down for the final strike , using the same weapon for all six strikes . " Theatrhythm Final Fantasy Curtain Call " . Cloud ' s " Advent Children " version wields the Fusion Sword in his character model . Non - " Final Fantasy " guest appearances . Cloud ' s weapon in " Kingdom Hearts II " is the completed assembly , although it is wrapped in bandages like the Buster Sword in the first " Kingdom Hearts " game . Cloud never fragments it into its individual swords , although he presumably could . He uses it in all his battles throughout the game . The is based on Cloud ' s fusion swords and takes inspiration from Cloud ' s Fenrir motorcycle , being the only Keyblade in the series thus far to be based on a modern pin tumbler lock key , as would be used for motorcycles . The Keyblade is given by Tifa after Sora defeats Sephiroth and witnesses his battle with Cloud . The completed fusion swords appears as an " Avatar Part " in " Kingdom Hearts Mobile " , as well as its port to " Kingdom Hearts Re : coded " . " Super Smash Bros . " . The Fusion Sword is Cloud ' s weapon if his alternate , " Advent Children " - themed costume is worn . He wields it as he does the Buster Sword in his primary attire . Merchandise . As Cloud ' s signature weapon in " Final Fantasy VII : Advent Children " , the fusion swords are included in several models and action figures of Cloud ' s appearance in the film , almost always as an assembled construct and not as the individual blades . Among other figures the sword is included with Cloud ' s " Play Arts " figure both by itself and including the motorcycle Fenrir . One such figure erroneously names the fusion swords as the Buster Sword , but most others do not give the swords a name . The Cloud Play Arts Kai action figure releasing at April 2015 includes the disassembled swords , which cannot be assembled , alongside a fully assembled one . For a brief time there was an unofficial manufactured , composed of four separate swords instead of six ( only one back blade , with the hollow blade and the main blade joined as one ) . Only 44 inches long and seven inches wide , it was not to full scale . Now hard to find , this replica is still sought by collectors .