***
Kara caught up to Purity's subway quickly, dropping down through the top of the car and behind the Worldkiller. "Purity?" she called to get her attention.
"You finally learned my name," she sneered, turning around and holding out her hands.
Kara watched everything vibrate around her, then smirked and lifted her hair slightly, revealing Winn's sonic device attached to her ear. She flew forward, barreling into Purity and knocking them out of the subway and onto the tracks.
Purity rose to her feet, eyes narrowed angrily, then turned as heels clacked on metal. "Not a nice feeling when you're overpowered, huh?" Laurel sneered, eyes narrowed as she and Malcolm walked out, Malcolm with his bow raised.
Purity turned and saw Mon-El and Oliver come from another direction, Oliver's bow raised as well, and when she rotated again, Slade and Alex practically melted from the shadows on Kara's right, both with their guns drawn.
She was completely surrounded.
Purity held her hands out to the side, starting the vibrations again. Alex just smirked when she felt no effects, and Laurel laughed in relief. Purity's eyes widened in shock, then turned when she heard a warping sound. J'onn walked through the wall on Kara's left, waving the cuffs Purity had worn earlier in a taunting way. Purity screamed at him desperately, but J'onn's body flickered red, and he phased right through the scream, smirking when she stopped.
Purity's eyes were wide in panic, and she turned around, breathing heavily as the eight closed in from all sides. She finally screamed again, but Laurel tilted her head when nothing happened to any of them.
Then they all heard the cracking under their feet, and Laurel swallowed hard. "Uh oh."
Purity's scream crumbled the ground beneath them, and all nine went tumbling down into the subway station below, landing in the rubble as civilians screamed and fled around them. "Why did you say that, Siren?" Malcolm seethed.
Purity managed to stand and scream again, but it wasn't directed at any of them. Kara, J'onn, and Mon-El turned as the scream went past them and slammed into one of the concrete posts, splintering it and making the ceiling rumble and dust and plaster fly. J'onn quickly flew over to support the post, Mon-El speeding after him a second later. "Guys!" Kara urged, looking around at the civilians.
"On it," Alex nodded, running to start evacuating civilians.
"Archer?" Oliver turned to look at Malcolm.
"Up?" he guessed.
Oliver nodded, and the two fired grappling arrows up into the ceiling. They went up into the air as Slade went in the opposite direction of Alex, Laurel slinking forward so she was with Kara against Purity.
Purity sneered, and Kara fired her heat vision, hoping to hit her. Purity dodged, and Kara fired again, gritting her teeth when Purity again avoided the hit. The shot narrowly missed a civilian, who dropped to the ground to avoid being hit. "Everybody, out!" Slade's voice roared through the station, startling everyone into action.
"Hey," Alex dropped by the fallen civilian. "It's all right. Get up. Up, up, up. Everybody, get out!" she yelled as she hurried the civilian off. "Out!"
"Go!" Slade continued to shout.
Mon-El looked around, watching a mixture of green and black arrows shoot from the rafters and knock falling debris off course, Slade occasionally doing the same with his sword as he helped civilians who were too slow. "We've got to get these people out of here!"
"Go!" J'onn told him, adjusting his hold on the post. "I've got this."
"You sure?" Mon-El asked.
"Yes, go!" At J'onn's confirmation, Mon-El carefully backed off, then sped away to help the evacuation.
Kara finally came to blows with Purity, the Worldkiller holding her own and then some. Kara got a few hits in at Purity's stomach and face, but Purity retaliated with a few uppercuts and a punch Kara blocked with her forearm, only for Purity to grab her arm and bend her over backwards. Kara tried to fly out of Purity's grasp, but Purity gritted her teeth and forced Kara back down, and Kara cried out when Purity bent her far enough for it to really hurt. "Supergirl!" Oliver yelled.
Laurel swallowed hard, inhaling as much as she dared. As Purity smashed Kara into the ground, she left herself wide open; Laurel took full advantage of that, screaming as hard as she could. Purity was more prepared for it this time, but she still staggered backwards and away from Kara.
Purity left herself right in the path of the charging Mon-El, and she whirled to meet the Daxamite's fists with her own. Laurel ran to check on Kara, bending down. "Kara?" she whispered quietly.
All she got was a pained whimper in response. "Siren, look out!" Slade suddenly shouted.
Laurel looked up, then quickly ducked as Mon-El went flying over her head, crashing into an electronic newsstand behind her. Laurel's eyes widened as Mon-El collapsed with a groan, slow to get up. Purity came storming towards her next, and Laurel swallowed, rising to her feet. "Julia?" she asked tentatively. "Please, don't."
"She can't come to the phone right now," Purity sneered, unleasing her scream.
Laurel braced herself and screamed back, already knowing what this result would be. Sure enough, when the screams collided, she was thrown back as her scream rebounded onto her. She didn't feel her back hit the ground, though. A familiar grip went around her, and her body jerked as her direction changed quickly. Then a surface was under her feet, and Laurel swayed, almost falling from the rafter she was now on, then the grip around her readjusted itself. "Easy," Malcolm warned, his voice still recognizable even with the voice modulator in place.
"Let her go!" Oliver's voice snarled.
Both whipped down to see Purity had Kara in a chokehold, Kara desperately yanking at Purity's arm even as she choked. "I'll tell you a secret," she whispered. "Julia's here."
"No!" Kara gasped out, eyes wide. "No!"
"And I'm going to make her watch while I kill you," Purity declared.
"No, Julia!" Kara croaked, clawing even more at Purity's arm, Slade and Alex running back. "Julia, please! Please, don't let her hurt me!" Purity's grip suddenly went a bit slack, and Alex slowed, eyes widening when she saw Purity's white eyes change to Julia's dark brown. "Julia!" Kara cried again, and Purity's eyes went back to white as she tightened her grip. "I know you're there!"
"You have a chance, Alex," Slade said quietly, and she looked at him with wide eyes. "You're the one who didn't see her before," he reminded her. "You can see her now. Make her see it, too."