Cavern of Earth The Cavern of Earth , also known as the Earth Cave and Terra Cavern , is a location from the original " Final Fantasy " . It is located south of Melmond , at the " Devil ' s Tail " , and the Warriors of Light must come here to find the source of the earth ' s rot . The first floor of the cave offers many branching paths away from the center starting point . The bend to the west of the entrance ladder is particularly dangerous as it forces repetitive battles at every single step , but the ladder to the next floor is a short walk east . The next three levels take some time to traverse through , as they are comprised of many small rooms and contain more powerful enemies . After defeating the Vampire and returning with the Earth Rod , the player can access the next two floors which hold even harder enemies . Story . The Warriors of Light descend through the cave and defeat a vampire residing on the third basement level , who seems to be the cause of the problem . However , this fails to stop the rotting of the earth . Later , they speak with the wise and ancient sage Sadda who lives in a cave to the west . Sadda gives them a rod with which they can move an obstacle at the back of the Vampire ' s chamber . They return with the rod and expose a secret passage , revealing two deeper floors into the cave . Here , they find and defeat the Lich , the Fiend of Earth who is leeching power off from the Earth Crystal , and rid the earth of its rotting , the first purification of the Crystals . Music . The Background Music that plays inside the Cavern of Earth is " Gurgu Volcano " . Other appearances . " Dissidia 012 Final Fantasy " . In the Confessions of the Creator Scenario , a Teleport Stone can be found at the Devil ' s Tail , and is named after the Cavern of Earth . Instead of the dungeon , the Chasm in the Rotting Land Gateway is located in the middle of the mountains . The player ' s first objective in the storyline is to head here and rescue the mured moogle . After rescuing him and eventually being directed to the Lands of Discord , the mured moogle reveals himself as Cid of the Lufaine and reveals the circumstances that lead to him becoming a moogle and being sealed in the gateway . When Chaos became Feral Chaos and killed all the summoned warriors , Cid took on the form of a moogle to enter World B and sealed himself and Cosmos in the depths of the Chasm in the Rotting Land gateway to protect the goddess from Feral Chaos ' s wrath . The time being sealed caused Cid to lose many of his memories , which he began to recover once the player rescued him . The Reports reveal that the Chasm in the Rotting Land is where Cid stayed during the cycles of war and conducted his studies and experiments . Here he created the Warrior of Light by infusing a manikin with his own memories , but when it did not show a will of its own , he placed it among the warriors summoned by the gods to observe how it grew . " Final Fantasy Record Keeper " . Cavern of Earth 1 . Word reaches the warriors that a vampire residing within the Cavern of Earth is responsible for the rot that plagues the land around Melmond . The warriors go to the cavern to investigate . Cavern of Earth 2 . When the warriors brandish the Earth Rod , a stone slab at the back of the vampire ' s room splits , revealing a stairway . Steeling their resolve , the warriors press onward .