Datalog / Paradoxes The following is a list of Datalog entries for the Paradoxes of " Final Fantasy XIII - 2 " . Time Gate s . " Added during Episode One , in New Bodhum - 003 AF - " Time Gates appear as strange glowing portals , and each requires a specific ' artefact ' to activate it . By passing through these gates and traveling outside the timeline , it is said one can eventually arrive in Valhalla . Artefacts . " Added during Episode One , in New Bodhum - 003 AF - " Artefacts are the keys that activate Time Gates . These objects can appear in any form , and are only identified as ' things that shouldn ' t exist ' or ' items from another time , ' making the search for an artefact a difficult task . Artefacts are strongly tied to their possessors , and are also said to take on completely different shapes depending on the person who handles them . Historia Crux . " Added when accessing the Historia Crux for the first time " The Historia Crux is the crossroads between the Time Gates . It is a separate dimension connecting one age to the next . This surreal plane is said to be the border of the chaotic realm of Valhalla , and only those with an affinity for the power of chaos are able to use it to travel through time . Even the godlike fal ' Cie are not free to enter the Historia Crux as they please . Paradox es . " Added during Episode Two , in the Bresha Ruins - 005 AF - " Following the appearance of the gate that appeared in New Bodhum in 3 AF , Time Gates began showing up in a multitude of locations . The research institute , the Academy , gave a name to the anomalies that accompany the arrival of these gates and cause impossible things to happen — they called them ' paradoxes . ' In any location where a paradox is present , people report strange occurrences , such as the sudden appearances of unusual monsters , and odd connections to other times and places . Cocoon ' s Fall : The Prophecy . " Added during Episode Three - Part 1 , in the Yaschas Massif - 01X AF - " In the Oracle Drive images that Hope shows in the Yaschas Massif , there is a scene that clearly shows Caius causing Cocoon to fall . Oracle Drives are said to hold the prophecies of the seeress . And in Noel ' s world , seven hundred years in the future , Cocoon has already fallen . From these two facts , it is predicted that the crystal pillar will crumble within the next few centuries , and send the massive sphere plummeting towards the surface of Pulse . The Crystal Pillar . " Added during Episode Three - Part 2 , in the Sunleth Waterscape - 300 AF - " During the catastrophe of 0 AF , a gigantic crystal pillar appeared and caught Cocoon in its embrace . This miracle was the work of Fang and Vanille , two women who sacrificed themselves to achieve the impossible . In the centuries that follow , however , erosion weakens the massive structure . This second threat to Cocoon triggers a war among its people , and the resulting violence brings the sphere crashing to the ground . The apocalyptic age in which Noel was born is what remains of the world after those tragic events come to pass . Gates of Augusta . " Added during Episode Four , in Augusta Tower - 200 AF - " " ACADEMY DATANET FILE " This information is accurate as of the year 200 AF . The highest floor of Augusta Tower is the site of a gate that behaves differently from the standard time portal , instead leading to a ' virtual space ' within the AI mainframe . To activate this special gate , one must climb to the top floor of the tower and directly access the AI ' s core . Paradox and Memory . " Added after talking to Noel in Academy Headquarters in Academia - 4XX AF - " Something strange is happening to Noel ' s memory . The affected parts appear to be anything related to Yeul , Caius , and the history of Cocoon ' s fall . The problem is not with Noel — interference in history has destabilized the past , giving rise to another type of paradox effect . Atlas . " Added during Episode Two , after the fight against Paradox Alpha " Atlas is a massive , humanoid war machine found within the Bresha Ruins , and it begin an uncontrolled rampage when the paradox effect was triggered . Only the left hand of Atlas was uncovered , but the rest of its invisible body is thought to exist in a different spacetime . Despite being excavated in the ruins of an ancient city , the technology that powers the giant is far beyond the capabilities of that age . Researchers theorize that Atlas is actually a man - made weapon pulled into the present from some future time period . The Fal ' Cie Fenrir . " Added during Episode Three - Part 1 , in the Yaschas Massif - 010 AF - " Fenrir is an immense fal ' Cie the size of a small moon . When this being appears , it begins to follow the sun ' s movement across the sky , resulting in an extended solar eclipse . Based on ancient records from Gran Pulse , researchers discovered that Fenrir appears according to a cycle . The fal ' Cie was not predicted to appear until the year 200 AF , and its arrival almost two centuries early is attributed to the latest paradox effect . Proto Fal ' Cie Adam . " Added during Episode Four , in Augusta Tower - 200 AF - " " ACADEMY DATANET FILE " Proto fal ' Cie Adam is an artificial fal ' Cie that oversees the city of Academia . This man - made entity handles all of the roles previously filled by the Cocoon fal ' Cie . Adam is an all - powerful being who protects the lives and interests of the citizenry — a fal ' Cie for the people . The Thirteenth Ark . " Added after examining the terminal on the Central Bridge in Academia - 4XX AF - " " ACADEMY DATANET FILE " The Thirteenth Ark is an ancient Gran Pulse military facility capable of sustained self - levitation . The floating fortress is currently deserted , and a number of Academy research teams have been sent inside to investigate . Scientists are primarily interested in the mechanism that allows the Ark to remain afloat without a constant supply of power from the fal ' Cie . The purpose of the facility remains unclear . Some theories posit the Ark was in operation during the war between Pulse and Cocoon .