Paradox ( theme ) " Paradox " is the theme in " Final Fantasy XIII - 2 " representing the paradox effect played throughout the story . Composed by Naoshi Mizuta , it features a fast paced haunting orchestral melody . Behind the main theme " FINAL FANTASY XIII - 2 - Wishes - " , it is the second most recurrent theme in the game and has many arrangements . Game appearances . " Final Fantasy XIII - 2 " . " Paradox " is the eighth track of the first disc . It plays at the beginning of Episode 1 , during the prophecy of Cocoon ' s fall in Yaschas Massif 01X AF , and after Serah talks to Snow in her dream in the Void Beyond . The " Paradox " motif is rearranged in twelve tracks : " Giant ' s Fist " , " The Story So Far . . . " , " Paradigm Shift " , " Song of the Farseers " , " Oracle Drive " , " Eyes of Etro " , " Oathbrand " , " Plains of Eternity " , " Threat Level Omega " , " Yeul ' s Theme " , " Time ' s Master " , and " Promise to the Future " . It is also featured in the " Closing Credits " . All of these tracks were also composed by Naoshi Mizuta . " Giant ' s Fist " plays during the series of battles in New Bodhum 3 AF at the beginning of Episode 1 , the battle with the first Gogmagog and the battle with Atlas . " Paradigm Shift " is a frequent battle theme that plays during random encounters . " The Story So Far . . . " plays when Mog speaks for the first time in the Bresha Ruins 5 AF , and during the story recaps that follow loading a save file . " Song of the Farseers " is an arrangement played with acoustic guitar and features vocals . It plays in the Yaschas Massif 010 AF after Hope tells Noel and Serah about the Farseers , after Hope induces a vision of Lightning and Caius ' s battle in Valhalla with the Oracle Drive , and during the boss battle against Pacos Amethyst and Pacos Luvulite in Academia 500 AF . " Oracle Drive " plays when Noel uses the Oracle Drive in Yaschas Massif 10 AF , and when he , Mog , and Serah first enter the Coliseum . " Eyes of Etro " only plays during the cutscene before Noel and Serah leave Oerba 200 AF after their battle against Caius . " Oathbrand " is a darker version of " Paradox " that plays at the beginning of Episode 3 , and when Alyssa betrays Noel and Serah in Academia 4XX AF . " Plains of Eternity " is an electronic pop song with vocal performed by Joelle and mixed by GOH HOTODA that features the " Paradox " motif , and is the background theme for the Archylte Steppe during sunny weather . " Threat Level Omega " is the background theme for Academia 400 AF . " Yeul ' s Theme " is the leitmotif of Yeul with vocals performed by Joelle , and plays when she dies in the Yaschas Massif 1X AF , Augusta Tower 200 AF , in the Dying World 700 AF after Caius and Noel ' s fight , and when Yeul dies in that time . " Time ' s Master " plays during the boss battle against Chaos Bahamut and Caius in Academia 500 AF . " Promise to the Future " plays after " Heart of Chaos , " during the clash of blades between Noel and Caius until before the final battle . In this track , the motif is rearranged alongside " Caius ' s Theme " . In the " Closing Credits " , " Paradox " plays after " Caius ' s Theme " and before " Noel ' s Theme " .