Vegnagun Vegnagun is a colossal weapon in " Final Fantasy X - 2 " . It is a powerful and fearsome machina created by the city of Bevelle during the Machina War , 1000 years before " Final Fantasy X " . The weapon is massive and powerful enough to potentially destroy all of Spira . It can sense emotion , and thus knows whether an approaching person means to do it harm . Vegnagun was not put in use due to its inability to tell friend from foe ; it was considered to be used against Sin , but due to its flaws was never used . Vegnagun is controlled by playing an organ - like instrument atop its head , each key emitting a colored glow when pressed . Its main weapon , a gargantuan cannon , fires concentrated energy to cause untold amounts of destruction . Story . During the Machina War between Zanarkand and Bevelle , Shuyin , in an attempt to save his beloved , Lenne , a summoner sent to the front lines , infiltrated Bevelle ' s headquarters to hijack Vegnagun and decimate Bevelle ' s troops . Lenne discovered Shuyin ' s scheme and rushed to stop him from activating the weapon . The pair was caught before Shuyin ' s plan could be put into action , and the lovers were shot by Bevelle ' s guards . While Lenne ' s memories coalesced into the Songstress dressphere , Shuyin ' s anger and grief along with his despair lived on past his death . A thousand years later , Vegnagun still resided as a forgotten secret among the lower caverns of Bevelle Underground . Shuyin ' s lingering hatred residing in the Den of Woe possessed the Crimson Squad members when they entered the den . The squad members killed each other all but for four who escaped the den , but unbeknown to them , one of them – Nooj – carried Shuyin ' s spirit inside of him . Via Nooj ' s body Shuyin attempted to activate Vegnagun but when the conflicted Nooj tried to approach the weapon it fled to the Farplane . With Vegnagun situated at the heart of the Farplane the machina could absorb ungodly amounts of energy , the same energy that Shinra describes that if tapped into , would power countless cities of light . Vegnagun would thus be able to absorb enough power to become capable of omnicide . Shuyin abandons Nooj ' s body for Baralai ' s who is easier for him to control , and takes Baralai to the Farplane to activate Vegnagun . With the combined teamwork of the Gullwings , Leblanc Syndicate , Nooj , and Gippal Vegnagun is dismantled piece by piece , before they confront Shuyin himself who falls to Yuna , Rikku and Paine and fades once being reunited with Lenne ' s spirit . As revealed in " Final Fantasy X - 2 Ultimania " , after he left the Gullwings to work for Rin , Shinra received financial support from his new employer to prove his hypothesis on an untapped energy source by modifying Vegnagun to harness the Farplane ' s energy . Gameplay . The battle against Vegnagun is a multi - stage affair , with YRP fighting its way towards the control center where Shuyin commands the titanic machina . The party must disable Vegnagun ' s tail , leg , core , and main cannon before Shuyin will confront the girls personally . Defeating the entirety of Vegnagun in the " Final Fantasy X - 2 HD Remaster " version earns the trophy Machine of War . Battles against Vegnagun ' s parts have a different battle opening than the rest of the game ; instead of the screen shattering and the view switching to battle mode , Vegnagun ' s battles open with a black hole sucking in the screen . Musical themes . The theme of Vegnagun is " Great Existence " called " The Colossus " in Luca sphere theater and iTunes . It plays when viewing the spheres of Vegnagun . Other appearances . " Theatrhythm Final Fantasy Curtain Call " . Vegnagun ' s body in the Farplane appears in a Battle Music Sequence . Etymology . Both aspects of Vegnagun ' s name may be Scandinavian in origin : " Vegna " translates to " because of " from Icelandic , and the common word " gun " is thought to be derived from Old Norse from either the names Gunnr or Gunnhilde , names of Valkyries , both meaning " war . " Therefore , Vegnagun ' s name directly translates into " because of the War ; " the Machina War is the origin of its creation . The names of many of Vegnagun ' s attacks are in Latin . Its most powerful attack , Nemo Ante Mortem Beatus , translates to " no one is happy before their death . "