Atra did not answer Locke's question immediately. Instead, he circled Locke, like a feral predator stalking prey. Locke turned about, keeping himself facing the Sith. He would not kill this man or end this fight before he had answers.
For a moment, it seemed as if Atra was contemplative. He opened his mouth, but no words came out. Instead, his lips peeled back in a snarl. Locke's eyes widened as Atra suddenly came at him again, wielding his lightsaber like a meat cleaver. Locke hurriedly raised his own weapon to block. Sunfire and cerulean clashed together, filling the chamber with an echoing cacophony of sound as Locke struggled to hold back Atra's furious assault. Finally, the Krath let out a yell and jumped back, narrowly dodging Atra's lightsaber as it fell through the space Locke had just occupied.
Locke quickly flicked his lightsaber up to block, deflecting Atra's next strike to the side. Though the Sith's attacks were not as blindingly-quick as they previously had been, he still posed a serious threat, forcing Locke to backpedal with each defending action. He could hold the Sith off if Atra continued to attack this way, but would eventually run out of room to maneuver.
The Krath risked a glance around, eyes settling on the door. He turned toward it, spinning on his first step to face Atra from this new angle, lightsaber angled down to force Atra's away. The Sith pursued him, but in mid-attack his cleaving strike changed. It ended differently, the downward cleave pushing out in a stab that nearly pierced Locke's neck. He held his lightsaber close and flicked it just far enough to the side to avoid being hit.
That feral, animalistic zeal was gone from his expression. The snarling predator had become a silent, calculating warrior again. Seemingly unaware of the change, Atra attacked. He began with a forward stab, sweeping it back as Locke moved to deflect it. The Sith spun in a circle, gaining momentum as he came around, blade set horizontally to remove Locke's head. The Krath evaded, stepping back and reforming his defense, allowing him to deflect Atra's next attack, which was much more direct.
"What happened to you? Locke asked.
"I told you, " Atra said, "Atra is dead. There is only Anima."
Atra struck again, forcing Locke back a little further as the Krath defended.
Locke shook his head slightly. "That does not answer my question. Why do you become so out of control at random? What is going on in your head? Surely that is not your fighting style!"
"That is none of your business, " Atra said.
"Then you cannot prove that Atra is dead," Locke said.
This time, Atra spoke slowly, the anger in his voice manifest as ice rather than inhuman rage. "He is dead. Further inquiries are mere denial of reality."
"I don't believe that, " Locke said. He stepped back as the two engaged in another quick series of strikes. The Krath was right in front of the door now. He waited, watching.
If that side of him is truly random, it should happen again, Locke thought. But what causes it? He thought he was beginning to figure it out - at least well enough to fight it, but it didn't seem to happen with any regularity, nor did Atra seem to do anything to intiate it.
"You can accept me as Anima, Consul, or be destroyed if you continue to question what is not yours to know."
"Anything that threatens the safety of the Clan is mine to know, " Locke countered resolutely.
Atra chuckled, then, displaying a bit of his old self. Locke allowed himself to relax slightly, thinking he might be getting somewhere.
Then, suddenly, the shift happened again. Something in Atra's eyes changed. He lunged into another attack, both hands dragging his lightsaber through the air, sweeping from the side. Locke moved with it, deflecting the attack at the very tip of Atra's blade, while raising his free hand. Locke called the Force and directed it at the door, forcing it to slide open.
Atra ignored that, mouth open in a wide grin that showed his teeth, tongue rolling across them as he continued to direct strong attacks at Locke. The Krath pushed himself to avoid them, weaving out of the way of those he could avoid and struggling to deflect what he needed to. The Krath could feel his arms aching, shaking more and more from each strike.
He needed to alter the environment, or he would lose. Locke rolled under Atra's next attack, diving through the door and into the hallway beyond. As the Sith pursued him, Locke yanked at the door with the Force. Trapped on it's sliding track, it slammed shut. As it closed, Locke saw Atra begin to slow.
So, his instincts still work when he's like that, Locke noted. It must have taken Force-enhanced reflexed to realize what was going to happen and slow, and the creature Atra had become did not show signs of thinking too carefully. As if to prove Locke's thoughts correct, he heard pounding on the door, as if Atra had somehow lost the ability to remember how to open it, or forgotten that his lightsaber could cut through it. As the door let out a metallic clank with each hit, Locke thought of something. He pushed his palm toward the door, gathering Force energy. The Krath breathed deeply. Atra's pounded the door rhythmically, as if he was drawing back and throwing himself against it repeatedly. Locke waited for the right moment, finally releasing that energy.
Thin blue bolts arced from Locke's fingertips, striking the door. As it conducted the electricity, it spread throughout it, to the top and bottom. Locke hoped it would affect the other side. When the energetic crackling died down, Locke heard a growl, followed by silence.
Panting quietly, Locke waited, looking at the door. He glanced down the hallway, toward the nearby library. He knew they were a few floors up from the surface and that the balcony in that room might present a danger, but it was a much more open space with many more obstacles. That would be useful.
Ominously, the door quietly slid open, revealing Atra's silhouette, surrounded by the glow of light from the sparring chamber.
"You ran way, " Atra said flatly.
"What have you become?" Locke asked, ignoring the barbed comment.
"Anima," Atra answered.
Frustration oozed through Locke's mind, sliding over the emptiness like contaminated mud, diluting his focus. With difficulty, he forced it to the edges of his perception.
Very well, Anima, Locke thought. Instead, he said "whatever you say, Atra." The words had the intended effect as Atra moved forward to attack.
Locke let himself be pressed down the hallway, entering the library hall. Students looked up from their studies, shock on their faces. Many evacuated the area at the sight of two combatants with lightsabers, others looked on in horror or interest. Locke barely paid them mind. He jumped up on one of the many long tables that dominated this part of the library, giving himself leverage to deflect an upward strike of Atra's. The Sith followed, but Locke stepped down from the other side of the table and swept his lightsaber toward Atra's legs. The Sith somersaulted to the side, landing near Locke, preparing to attack again.
If you truly have changed, I cannot let you live, Locke thought. These random bouts of apparent madness were an unpredictable threat. That made for a unreliable ally, if this new Atra could even be considered an ally. If I am even really fighting Atra.
For the first time, Locke doubted himself. He shoved the thought away, quieting his emotions. Regardless of what he thought, Atra had to be stopped. Such a threat could not be allowed to survive.
No, not Atra. Anima. My friend is gone," Locke told himself. He grieved, but not for long, as Anima aggressively attacked. His unpredictable, precise strikes were like Atra's, but Locke saw something more menacing in them now. There was a furious, murderous intent to each attack, instead of the simple economy Atra had once fought with.
Locke had to end the battle quickly. He side-stepped away from Anima's next attack, summoning the Force and directing it outward from his body, causing nearby chairs to shift and datapads to slide away. One of the students shouted, but Locke ignored their words as he gathered the Force again. Atra had stopped short of the blast's radius, gazing intently on Locke. He looked away briefly and Locke followed his eyes, seeing an ancient book flying toward his face. Tightening his lip in regret, Locke split it in half with his lightsaber, focus intent on gathering the Force. He spread it throughout his body, enhancing both his arms and legs.
It was time to finish this battle. Locke attacked for the first time, truly seeking to defeat his opponent. He swept his lightsaber toward Atra's rib cage, intending to cut across it. The Sith responded quickly, and the two traded blows at a blindingly fast rate, as Locke tried several short, angled strikes and Atra deflected each of them, stepping back only slightly.
Locke maneuvered until they were both near the edge of the balcony. A quick glance showed they were at least three floors up, the tops of aisles and tables far below. Dodging another attack, Locke put the second part of his plan into motion. He focused the Force around Anima, thinking of it as something like a strong weight, bogging him down, counteracting his enhanced movements.
Sidestepping more quickly than Atra could follow, Locke positioned himself opposite the balcony's edge with Anima between him and it. Locke deflected Anima's next strike and then thrust out his free hand, sending a wave of Force energy against the Sith's chest. Anima stumbled backward, leaning over the railing. Without thinking, Locke drew his arms back, crouched, and shoved, throwing his shoulder against Anima's chest. He pushed up as the Sith brought his lightsaber up to remove Locke's arm, but it stopped when Anima realized he was falling.
Locke watched as the Sith hit the ground below, wincing at the sound of it. He watched as the Sith's lightsaber shut off and rolled to one side, and a group of students began to gather around the body. Locke knew that he should go down and make sure Anima was dead. The monster that his friend had become would be a great threat to the Brotherhood if he survived. However, now that he was not in the heat of battle, Locke found he could not bring himself to do it. Instead he stepped away from the balcony, shutting off his lightsaber. The Krath ignored the students who stared at him as he made his way out of the library hall, regret creeping into his mind as he finally let his battle focus collapse completely.
Some issues with shifting tense here. Also, while I discussed it with other judges and they thought it was ok, the use of Shock on the door was a bit suspect. Clearer description of what you were trying to do would have helped.