Giant of Babil The Giant of Babil , also known as the Giant of Bab - Il or Babel , is a machine of tremendous power in " Final Fantasy IV " and is so large it actually serves as a dungeon . Story . Created by Zemus and other radical Lunarian s , its purpose is to destroy the human race on Earth so the Lunarians can colonize the planet . The other Lunarians rejected this design and sealed the Giant in the Lunar Subterrane . Through Golbez , Zemus gathered the eight Crystals at the Tower of Babil to transport the Giant to Earth . It is brought to the planet and unleashes an attack , but a pincer attack from the forces of the Overworld and Underworld stalls it . Cecil Harvey , Fusoya and their allies penetrate into the Giant and destroy its CPU and the Giant is immobilized and self - destructs . It is accessible from the exit back in the giant ' s inner passage , just after the save point . Midway , the four elemental archfiends have been resurrected and attempt to slay the party , only to be defeated again . To fight Geryon , the player may prompt the very same spot after this battle , which says that the four fiends ' malice remains anchored to it . Geryon may then be fought multiple times . The control core is accessible from the exit back in the giant ' s Inner Stair . It is the heart of the giant , and is the final room of the dungeon . The party must take out the CPU and the Attack and Defense Nodes to shut down the giant . Afterwards , Golbez appears and Fusoya brings the enthralled Golbez back to his senses . Golbez then reveals his and Cecil ' s origins and why Zemus was able to control him . Fusoya and Golbez then leave the group , heading for the Lunar Subterrane to finish off Zemus . As the giant is collapsing , a now - free Kain shows them to the exit . Shop . This shop only appears in the 3D versions , right at the save point inside the Giant of Babil . The merchant is an NPC that takes the appearance of Namingway . Enemies . " Final Fantasy IV " . In the 3D remake , after beating the game once , returning to the area where Cecil fought the four Elemental Archfiends allows for a new boss battle with one of the game ' s superboss es , Geryon . A prototype of the giant , Proto - Babil , appears as a superboss in the game as well . It is only fought on a second or third play - through with the player carrying Dark Matter , stolen from Zeromus , and using it on the stone face on the Red Moon . Proto - Babil is considered the most powerful boss . In " " , a new post - game boss called Lost Babil was added . The player must talk to Challengingway in the secret location on the True Moon . To face the boss , the player must pay him a fee of 500 , 000 gil and Challengingway will offer the player a reward consisting of three and two if they defeat Lost Babil . The player must create three parties to fight three boss battles ; one against Lost Babil ' s torso , and another against his head ; the last encounter is against the Lost Babil ' s CPU , which has six nodes accompanying it . Musical themes . The background theme that plays inside the Giant of Babil is " The Giant ' s Dungeon " . It is available as a purchasable battle background music for " Dissidia 012 Final Fantasy " as part of a pack of three tracks from " Final Fantasy IV " . This track and the original SNES version also appear in " Dissidia Final Fantasy " arcade version . Other appearances . " Dissidia 012 Final Fantasy " . The Giant of Babil appears as one of several new summons . When summoned it uses Lunar Ray to subtract 30 % of each character ' s Bravery and add it to the Bravery Pool . It can be purchased from certain Moogle Shop s for 120 KP . " Theatrhythm Final Fantasy " . Called " Within the Giant " , the song that plays inside the Giant of Babil appears as a Dark Note .