Editing Terra

Shortly after, Terra and Aqua are sent on a quest to find the missing Master Xehanort and stop the threat of the [[Unversed]], and Eraqus tells Terra he has a second chance to prove himself worthy of being named a Keyblade Master. In the meantime, Eraqus has Aqua follow Terra, to bring him back if he is tempted by darkness.  

Throughout his journey, Terra encounters many villains in the worlds he visits (although because of Terra's inexperience, he doesn't immediately realize they are villains). [[Maleficent]] takes a particular interest in him, having been alerted of his arrival in the [[Enchanted Dominion]] by Xehanort. She uses the darkness in his heart to put him into a trance, to make him steal the heart of the sleeping Princess [[Aurora]]. This encounter would haunt Terra for the rest of his journey. However, Terra did have some positive outcomes in his search. The [[Magic Mirror]] in [[Dwarf Woodlands]] revealed Master Xehanort was at a place where a great battle took place; he also learned from the [[Grand Duke]] of [[Castle of Dreams]] that the Unversed were being commanded by a boy in a mask.

After leaving his friends, Terra encounters [[Braig]], who claims to be holding Master Xehanort hostage under the Outer Gardens and demands Terra meet him there. Though it would be highly unlikely that a normal person could take a Keyblade Master hostage, Terra decides to check out the claim as a precaution. Terra arrives at the Purification Facility to see Master Xehanort chained to a column, and Braig challenges Terra to a fight, saying he wants a Keyblade for himself. With encouragement from Master Xehanort, Terra suddenly channels his darkness and scars Braig's face, driving him off. A second blast frees Xehanort, but Terra is dismayed that he failed to keep his darkness in check.  

Master Xehanort assures him that he channeled the darkness in his heart, and that using it is a true step forward. He further explains that the lights of Terra's fellow pupils shine too bright, thus casting shadows on his heart. Master Xehanort says that the reason that Eraqus did not grant Terra the title of Master is because he is afraid of the power of darkness; in Terra the power is strong, and Eraqus fears darkness so much because he has succumbed to light. Xehanort asks Terra to join him as his pupil so they may bring balance between light and darkness, and he tells him to see more worlds to find and destroy Vanitas. As Terra prepares to leave Radiant Garden, Ventus catches up with him, asking to come along. Terra turns him down, but he tells him that he knows Ventus will be there for him when he needs him.

Some time later, Terra is drawn towards a warm light, which leads him to the [[Destiny Islands]]. He finds a [[Paopu Fruit]], which reminds of the legend Aqua told him about the Wayfinders. He sees two young boys, [[Sora]] and [[Riku]], and he senses light within Riku. Terra speaks with Riku, who tells him he wants to become strong in order to protect his friends, and he decides to perform a [[Bequeathing]] with Riku, allowing him to wield the Keyblade in the future.

Terra sees Ven in the Lanes Between, but before Terra can catch up to him, Master Xehanort calls Terra back to the Keyblade Graveyard. Xehanort tells him that Ventus intends to confront Master Eraqus about his past, and that he is in danger. Determined to protect his friend, Terra returns to the Land of Departure in time to defend Ventus from Eraqus's attack. He throws Ven into a portal to the Lanes Between and, channeling his darkness, defeats Eraqus in battle. Although they both regret their actions, Eraqus is suddenly destroyed by Xehanort, who encourages Terra to give himself over to darkness. He tells Terra to come to the [[Keyblade Graveyard]] to witness the ends of Ventus and Aqua, then unleashes a flood of darkness which ravages the world. Terra watches his world crumble into ruins and looks at his Wayfinder, vowing to Ventus and Aqua that he won't let Xehanort kill them.

A vision of Terra appears to Aqua after she defeats the Demon Tower in the remains of the Castle of Dreams. She questions if he, too, has been trapped in the Realm of Darkness, but he simply fades away, causing her to wonder if she has started going insane.{{storylink|Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-}}.   

Later, in the remains of Enchanted Dominion, Aqua encounters phantoms of Terra and Ventus, pursuing them through the Forest of Thorns. When she catches up with them, Terra asks Aqua if she can see him. Aqua mentions she can, along with Ventus, but Terra is unable to see Ventus. Questioning where he is, Aqua tells him the worlds fell, and she is unsure if he is the real Terra. Terra insists he is, but also claims that he is not himself and that her heart is painting him the way she remembers him. He explains that his heart is tied to the darkness and that the Ventus beside him must be an illusion created by her heart. Aqua wonders if this means Ventus and Terra are safe on the outside world, and while Terra thinks so, he warns her that Xehanort is looking for Ventus. As she explains that she has hidden Ventus somewhere where no one will find him, Terra's spirit transforms into Terra-Xehanort. Terra-Xehanort wonders if Ventus is in the [[Chamber of Waking]] and, when questioned by Aqua, begins to reveal his identity.<ref>'''''Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-'', Terra-Xehanort''': "You don't know? My name-"</ref> However, Terra overpowers Xehanort's will, informing her of Xehanort's ruse. Surprised, Xehanort summons dark hands to drag Aqua into darkness, but an enraged Terra summons chains of light to fend off Xehanort.{{storylink|Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-}}

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