Troia Castle Troia Castle is a location in " Final Fantasy IV " and " " . It is where the eight Epopts rule over Troia and guard the Earth Crystal . Story . " Final Fantasy IV " . Cecil , Tellah , Yang , and Cid arrive at Troia Castle to obtain the Earth Crystal to trade it for Rosa , whom Golbez has taken captive , but find out the Dark Elf has already stolen it . They visit Edward in the castle infirmary , where he has been taken care of since washing ashore after Leviathan sank the ship the party was on . He gives them the Whisperweed to help them find the Crystal . When Cecil and his allies are unable to defeat the Dark Elf , Edward crawls out of bed to reach his harp , and plays a song that is transmitted through the Whisperweed to the Dark Elf ' s lair , and breaks the Dark Elf ' s spell that prevents usage of metal equipment . After defeating the Dark Elf , Cecil and his friends return to the castle with the Earth Crystal and are contacted by Kain , who is ready to trade Rosa for the Crystal at the Tower of Zot . Palom is sent to Troia to help train Leonora in the arts of Black Magic , and head to the Tower of Trials to train her . Upon returning , Leonora is entrusted with the Crystal to protect it from the Mysterious Girl , and both Palom and Leonora are forced to escape from Troia to the Lodestone Cavern . In The Crystals , Rydia , Edge , Luca and the Man in Black find Troia frozen over by Shiva . It is thawed once Shiva is defeated . Locations . 1F . It is the first room after the entrance , and has two exits leading to the west and east towers . The room ' s entrance is guarded by two female sentinels , plus two more for the east and west exits . North of it is the Epopts ' Chamber , which entrance is guarded by two female soldiers . Epopts ' Chamber . It is the first door straight of 1F . It is the chamber where the Eight Epopts of Troia are found . They inform the party , if spoken too , that the Dark Elf has stolen the Earth Crystal , and has taken it to its lair , the Lodestone Cavern . They also warn the party about the cavern ' s strong magnetic field and location . North of the chamber is the crystal room . Crystal Chamber . It is directly straight ahead the Epopts ' Chamber , and it is where the Earth Crystal is kept . When the player visits it , the crystal dais will be empty . Infirmary . The castle ' s infirmary can be accessed from 1F ' s left exit , which leads to the west wing . The first and only door leads to the room where Edward is recovering under the supervision of two doctors . If the player visits the infirmary , Edward will give them the Whisperweed . He offers to rejoin the party , but Tellah tells him to rest . When he senses the party on the verge of death in the Lodestone Cavern , he crawls out of his bed and plays the Melody of Lute to save them . Upon the party ' s return , he will inform the party about the magical song and gives them augments . His last message is " Save Rosa . " After the events of the Giant of Babil , the infirmary is empty . B1 . The bottom floor is accessible from 1F ' s right exit , which leads to the east wing . The East Tower is the first and only door , and it leads to the castle ' s treasure vaults . The left exit is B1 , which , according to the NPC , was the former castle dungeon . It leads to the second bottom floor . B2 . The second bottom floor can only be accessible once the party obtains the Earth Crystal , and the Epopts ' permission . If the player tries to visit it earlier , the guard will deny access . A secret passage leads to the second bottom floor , which is the castle ' s treasure room , and contains eighteen treasure chests .