Datalog / History and Myth ( Final Fantasy XIII - 2 ) The following is a list of Datalog entries for the History and Myth of " Final Fantasy XIII - 2 " . The Goddess Etro . In the ancient annals of Gran Pulse , Etro appears as the goddess of death and chaos . She is said to reside in the world where the souls of the dead find their rest — Valhalla . The people of the lowerworld worship Pulse , the great deity from which the land takes its name . Many tales from their folklore portray Etro as the abhorrent goddess of the afterlife . In the city of Paddra , however , faith in the goddess was commonplace , and it was said that the seeress drew from prophetic powers directly from Etro . Valhalla . Valhalla is an otherworldly dimension , also known as the Unseen Realm . According to Pulse legend , it is the final resting place of the souls of the dead , and the chaotic world where the goddess Etro makes her home . Some theories describe it as a city that exists beyond the flow of time , and others claim it is a future where time has come to a standstill . The seeress of Paddra describes it thus : ' The entire span of time can be seen from Valhalla . But to exert power beyond its borders , one must first open Etro ' s gate ' . Guardians . " Added after speaking to Mog in a Dying World - 700 AF - " The warriors who accompany and protect the seeress Yeul are chosen from among the most capable of the Farseer people . A Guardian is the strongest of these , a defender that wields the power of chaos . This power is said to surpass even the godlike might of the fal ' Cie . Only one true Guardian is permitted to exist at any one time . Another protector of the Farseer tribe who challenges and defeats the champion becomes the new Guardian and wielder of chaotic energy . Heart of Chaos . " Added after speaking to Mog in a Dying World - 700 AF - " The Heart of Chaos is the goddess Etro ' s own heart , given to Caius . It is the font of the immortal Guardian ' s power . Only if another potential Guardian defeats him and takes this power can Caius truly be killed . And the only person remaining in this world with that potential is Noel . If the new Guardian has enough strength of will , he can release the Heart ' s power and put an end to immortal destiny . If he wavers , however , he will be enslaved in chains of chaos , and become the latest in a line of eternal servants . Eyes of Etro . " Added after the battle with Gogmagog in a Dying World - 700 AF - " The ' Eyes of Etro ' is another name given to Yeul ' s power to see changes in the timeline . Not restricted to the past or future , Yeul can witness any period in history . This ability is associated with the power of chaos , and is thus seen as a blessing of the goddess . The fact that Serah shares this ability is a sign that she has come under the gaze of Etro at some point in the past . Every time a seeress has a vision , a part of her life force is drained away . For this reason , all the Yeuls in history have died before their twentieth birthdays . The Eyes of Etro cannot be voluntarily closed , and most often when history undergoes a significant upheaval . Noel is afraid that every change they make during their journey is eating away a little more of Serah ' s life span . Oracle Drive s . " Added during Episode Three , in the Yaschas Massif - 010 AF - " Oracle Drives are ancient image capturing devices found across the breadth of Gran Pulse . They appear to hold the visions seen by the Paddraean seeress . Images that depict the future as seen from that time have been proven to be accurate . An Oracle Drive was discovered near the Paddraean Ruins by Hope and his team of researchers . Due to the appearance of several gates in the area , the scientists are focusing on the relationship between the drive and the paradox effect . The Farseer s . " Added during Episode Three , in the Yaschas Massif - 010 AF - " Centuries in the past on Gran Pulse , a people known as the Farseers built the prosperous city of Paddra . They flourished under the guidance of the seeress , whose predictions of the future guided the growth of their civilization . After the War of Transgression that took place between Cocoon and Pulse , it is thought that the Farseer civilization died out . Another theory suggests that the people of Paddra became a nomadic tribe , and still roam the wilds of Gran Pulse . Unseen Chaos . " Added at the start of the Last Episode , in Academia - 500 AF - " The chaos of the Unseen Realm is a malevolent energy that seep through into the world of mortals . The existence - defying darkness witnessed by Lightning is an immense and inexorable force , a creeping doom that she is not even certain acts with a unified purpose or will . Where the chaos of Valhalla leaks into the mortal realm , the laws of the physical world are undone . This paradoxical energy seeks to return all existence to the Unseen Realm , but at times it seems to show an almost affection for those who share an affinity with chaos . Etro ' s gate . " Added after speaking with Lightning in New Bodhum - 700 AF - " The instant Etro ' s gate opened , a world - devouring darkness slipped through from Valhalla . The goddess turned back the river of time and that terrible darkness — the Unseen chaos — was sealed away . Her power exhausted , Etro fell into a sleep from which she would never awaken . It was Lightning who sensed that someone meant to exploit that weakness and destroy the goddess for good . She learned of the man named Caius Ballad . If the goddess is destroyed , the chaos of the Unseen Realm would be unleashed , and the mortal realm devoured by Valhalla . Lightning decided to stand and fight , to protect Etro and see her benevolent will upheld . Death of a Goddess . " Added after beating the game " The goddess is dead . Noel plunged his sword into the Heart of Chaos , and Etro ' s very presence faded away like mist . Freed from the deity ' s constraints , the chaos of the Unseen Realm then rose up in a great wave and smashed apart Etro ' s gate with contemptuous ease . The swirling maelstrom roiled forth with a strength beyond imagination . All of existence was engulfed in darkness , and the world that remained was bereft of life and death , past and future . At the height of her battle with Caius , Lightning realized this fate was unavoidable . The weary warrior entered into crystal slumber with but one wish in her heart . An Immortal Wish . " Added after beating the game " To destroy the divine heart within his breast , and unleash the maelstrom of chaos — this was Caius ' s only wish . And so he waited . He needed one who could surpass him in battle and had the potential to still the Heart of Chaos . When Noel was born , the Guardian ' s prayers were answered . If Caius failed to open Etro ' s gate , he would force Noel to slay the goddess . With the timeline still bent and distorted , the chaotic energy freed by that act would rise of its own accord and shatter the gate . It was his only hope .