I think this is the longest chapter in the book, because there was no way I was gonna split up the final battle.

Enjoy the heroes vs the Nazis!

***

Overgirl growled as the Wellenreither descended upon Central City. "Let them run," she sneered in delight, firing on the citizens. "We'll turn this city into a mausoleum!"

As Overgirl rained down hell from above, Black Arrow, the Terminator, and the Magician led their troops into battle, killing everyone who tried to stand in their way. Black Arrow had just cut down two of the police officers who tried to fight when something caught his eye.

Oliver, Barry, Sara, Slade, Malcolm, Laurel, and Alex were the first through the smoke, then the rest of the ground heroes formed up behind them: Curtis, Amaya, Rene, James, Nate, Thea, Mick, Leo, Zari, and Dinah. Sara, Laurel, and Alex fell back slightly so Oliver, Barry, Slade, and Malcolm were in the very front, ready to take on their doppelgängers and nemesis.

Black Arrow snarled angrily. "Kill them all!" he ordered.

"Yes, Führer!" the Nazis responded as Black Arrow readied his bow by his side, the Terminator and the Magician doing the same with their weapons.

Opposite them, Slade drew his sword as Malcolm swung his bow over his shoulder, drawing his sword as well. Behind them, Nate's skin turned to steel as James's shield formed, Dinah snapping her staff to full length. As the Nazis approached, Oliver looked up when he heard a sharp crack in the air. Kara descended to hover above between him and Barry, J'onn flying down and stopping at her left, Clark on her right. Firestorm and Palmer were next to fly down on either side of the aliens, and Terrill and Caitlin soared down behind them.

They exchanged nods, and Oliver took a deep breath, turning back to the Nazis. "Cry havoc," he muttered.

"Let loose the dogs of war," Malcolm finished.

Oliver nodded, and as the Nazis raised their guns, the four in front charged forward, Kara zooming after them. From there, it was a mess of bodies and weapons as everyone rushed into battle.

***

J'onn's attention was drawn by Nazis tossing grenades and firing into civilians in a park nearby. He dove down and flung two Nazis into the street, where Thea was quick to shoot arrows into them. Rene ran past J'onn to a little boy lost in the smoke, and he picked him up, firing at the Nazis as he carried the boy to safety.

Mick aimed his flamethrower at a Nazi approaching, and he fired, bringing the Nazi down. "Excuse me!" Leo huffed, storming up to him. "You can't just go around roasting people!"

"Why not?" Mick scowled.

"You ever heard of due process? Rule of law?"

Mick just turned around to go find more Nazis to roast. "No!"

***

Sara shot one Nazi in the chest, then grabbed another and flipped him around, swinging her gun into his head. She spun around as another Nazi approached, then dropped to the ground. Keeping one hand flat on the grass, she swiveled, using kicking his legs out from under him. She stood up and pivoted again, driving the heel of her boot into the Nazi's helmet, sending him crashing to the ground.

She paused when she saw more Nazis approaching her, then grimaced and bent over double, holding her ears when not one, not two, but three sonic blasts hit them. When she looked up again, Alex, Laurel, and Dinah had dove into the fray, and Sara had the pleasure of watching the Black Squad demolish all of them.

She ducked when a blast from the Wellenreiter narrowly missed her, and scowling, she looked up. "Could use a little help here!"

***

"And we got you covered!" Winn announced as he and Felicity hurried around the Waverider, manning tech everywhere, Iris grinning from her position at the console.

Lena grinned as she watched the lasers fire at the Wellenreiter, the Nazi ship turning and flying off. "Nice shot!"

Cisco just whooped in glee as he flew the Waverider after them, Harry grinning from his other side. "This is just like Star Raiders on Atari, except it's real!"

"Cut the chatter, Red Two," Harry smirked. "Fly the ship."

"Launching torpedo one," Cisco answered, tapping the controls.

Harry rolled his eyes as Lena laughed from where she stood on Cisco's other side. "You don't have to say it out loud!"

Iris watched Cisco aim at the Wellenreiter, then frowned when the torpedo didn't even slow the ship down. "OK, guys, it is just me, or is this not working?"

"It's not working," all three answered.

"You need to take down their shields," Felicity said, looking up from her tablet.

***

James and Nate found themselves working together side by side, James using his shield to defend himself and smack down Nazis, Nate's steel skin deflecting bullets and allowing him to knock out Nazis with a single blow to the head. Rapid fire hit the Legend from behind, and he frowned, turning around. He held up his arm to shield his eyes, then delivered a hard kick into the offending Nazi's stomach, catapulting him back.

He landed close to where Curtis was weaving through Nazis, then turned and threw one of his T-spheres. A small, blue-lit blur flew from the top of the sphere, and blasts of blue light hit several Nazis before Palmer returned to his normal height, delivering a sharp punch to one Nazi's jaw, sending him flying into the air. Clark flew down and rammed both feet into the Nazi's back, sending him hard into the ground.

Curtis, Rene, James, and Thea all found themselves backing up to stand together with Palmer and Clark looking out from above, and Rene shot a few Nazis before three fights under the bridge nearby caught his eye, and he tossed a grenade their way.

***

From where they were duking it out on a SWAT van, neither Oliver nor Black Arrow reacted to the grenade that went off behind them, but it was close enough to where Malcolm and the Magician were dueling that they had to twist to avoid shrapnel flying at them. Certain moves still made Malcolm wince in pain, but he was holding his own as he and the Magician clashed with both swords and bows. From the other side of the van, Slade and the Terminator were black, orange, and red blurs, their swords hitting so hard sparks were flying.

However, they moved nowhere as fast as the speedsters. Barry and Thawne moved between them at super speed, yellow and red lightning crackling through the air as they each tried to get the upper hand.

Eventually, they sped through the dueling doppelgängers and out into the city, running under Terrill as he flew down to back Leo and Mick up. Kara swooped down after him, taking stock of Oliver, Malcolm, and Slade's duels. She watched in concern as Oliver nearly dodged a swing from Black Arrow, only to smile as her boyfriend launched a fletchette that buried into the back of Black Arrow's leg, making him stagger slightly. She shot her heat vision down and took out a few Nazis approaching Nate, Zari, and Amaya before flying off, Alex, Sara, Dinah, and Laurel running back to join the main fight.

***

Winn groaned as his tablet lit up red again. "Seriously?"

"Guys, this isn't working," Felicity swallowed as she hit the same problem. "I think we need a bigger gun!"

Blurs of blue, red, and green shot past the Waverider, and everyone onboard watched Kara fly towards the Wellenreiter, Clark and J'onn with her. "Way ahead of you!" she called.

***

Overgirl watched the fight with narrowed eyes, then heard a Nazi approach. "General," he said, and she turned around to see him standing behind her. "We've got inbound."

Overgirl scowled. "Then fire countermeasures!" she ordered.

"We can't," he swallowed. "They're hovering directly off our bow."

Overgirl frowned, then turned around. Her eyes widened as Kara stopped in front of her. "General!" she smirked, folding her arms as Clark and J'onn joined her. "Would you care to step outside?"

Overgirl bristled in fury, then reached up and activated her mask. The moment it formed, she flew out the window, shattering the glass and ramming into her doppelgänger.

***

Somehow, while Oliver and Black Arrow remained fighting on top the SWAT van, Slade and Malcolm found themselves back to back, fighting their doppelgängers together. "Of course we work well together no matter which Earth!" Malcolm growled, ducking to avoid a sword swipe.

"Not – " Slade swerved, and the Terminator's sword sliced into the police car behind him. " – surprising!" He turned around to see how his partner was doing, only for his eye to widen. "Malcolm!"

Malcolm's eyes widened when he saw the knife the Magician was bringing to jam into his side, but a fireball slammed into his back. The Magician went flying into the side of the SWAT van, making the archers atop stumble. At the same time, a silver knife flew past Slade and buried into the Terminator's shoulder.

As the Terminator yelled in pain and the Magician tried to regain his footing, Slade and Malcolm turned in shock. Firestorm landed on the pavement and Sara ran up. "Like we said," Sara said, pulling another knife out as Firestorm's hands lit. "We're on the same team."

Firestorm smirked. "Like Grey says – once more, unto the breach!"

Slade and Malcolm nodded in acknowledgement, turning to face their doppelgängers once more, Sara running forward to engage the Terminator as well, Firestorm flying into the air to cover Malcolm as he faced the Magician.

***

"Guys?" Lena called as Cisco kept on the Wellenreiter's tail. "We could really use some good news here!"

"We don't have any for you!" Felicity called back.

"Yeah, the only way to take our their shields is to get someone onboard that ship!" Winn agreed.

Yet again, a blur of blue soared past the Waverider, except this time, there were no aliens in sight. "We're on our way!" Caitlin called as she used her powers to propel herself towards the Wellenreiter, Amaya and Zari hanging on behind her.

Her ice slide brought them right to the Wellenreiter, and the trio jumped down into the ship. Amaya jumped over the central console, kicking one of the officers in the chest and bringing him to the ground. Caitlin shot ice at another one, and Zari used her totem and blasted a burst of air at another. Amaya grabbed the last one and twisted his arm, then flipped him over her shoulder, knocking him out with a punch to the head.

"We're on the bridge, guys!" Zari called, walking to the center console.

"But we don't know what we're looking for," Amaya frowned.

"Yeah, yeah, yeah, we're working on it," Felicity answered.

A moment later, Iris came online. "They've got it. I'm sending you the source code for their deflector shields."

"Yeah, got it," Zari nodded, watching it appear on the console. "Manual override protocol."

"If I am reading this correctly, all you need to do now is – "

Caitlin turned, hearing a pulsing noise, and she smirked. "Hit the big, blinking red button," she guessed, walking over and pressing it.

***

Iris grinned when the update came on the Waverider's console. "Got it!" she cheered. "Shields are down!"

"Harry, you think you can handle this bad boy?" Cisco asked, standing up.

"Got a pretty good copilot," Harry nodded at Lena, who smirked as he sat down. "This'll be a walk in the park, Kazansky."

"Where are you going?" Iris frowned.

"Getting our friends off that ship," Cisco answered, putting his goggles on and turning to Harry. "Count of ten, hit them with everything we got."

"You got it," Harry nodded, Lena leaning over his shoulder as Cisco opened a breach, jumping through.

***

Overgirl threw J'onn away from her, then flew backwards when Clark rammed into her. She twisted in midair and caught Kara's fist with her own, delivering a sharp uppercut to her jaw, sending her flying backwards. Kara returned a moment later, punching Overgirl through the clouds.

Down on the ground below, the speedster battle had spread to all over the city, Thawne and Barry trying to throw each other off every chance they got.

Back under the bridge, however, the battle was turning in Slade and Malcolm's favor. With Sara and Firestorm watching their backs, it didn't take long to force the Terminator and the Magician into impossible positions.

It got to the point where Firestorm launched a fireball at the Magician, and he had to twist his body entirely to avoid it, and Malcolm shoved his sword straight through his doppelgänger's chest. He smirked when the Magician stiffened, his sword falling from his grip. "That's what you get for messing with my family," he hissed, kicking the body off his blade.

"Excellent work, Jefferson," Stein said.

"You, too, Grey," Jax grinned as he flew down to land by Malcolm. "Nice way to go out, don't you think?"

"I completely agree."

***

J'onn flew out of the way to avoid the heat vision shot at him by Overgirl, and she flew to the side as Clark shot his back at her. She spun around as Kara flew up behind her, and they twirled through the clouds as their heat vision met in midair. Kara used the opportunity to fly closer and punched her doppelgänger in the chest, sending her tumbling head over heels through the sky.

Clark and J'onn flew down towards the city to gain momentum, and they passed by Barry and Thawne racing up and down buildings to build up speed of their own, and they watched as they leapt at each other from skyscrapers, meeting midair.

***

With the death of his partner, the Terminator seemed to gain even more speed, forcing Slade and Sara to move even quicker to avoid his blows. However, that also meant that Malcolm joined them in the fight.

It was Sara who found the opening they needed. With a grin, she dropped to the ground, avoiding the sword aimed at her head. With all the strength she had, she thrust her knife up and through his armor, into the Terminator's back.

It wasn't a kill strike, but it was painful enough as the Terminator let out a roar of pain, losing his concentration. Malcolm quickly backed up as Slade drove his sword through his doppelgänger's right eye, the same eye Oliver had taken out years ago. "No one hurts my sister and gets away with it," he growled, pulling his sword out and cutting through the Terminator's neck.

Sara nimbly avoided the spray of blood as the Terminator fell dead, and she sighed in relief. "Thank God."

***

Harry finished his count to ten and gritted his teeth, looking up at Lena. She just shook her head helplessly, and Harry braced himself, pressing the button on the controls to fire everything the Waverider had. "Come on, Ramon," he growled.

The Waverider flew over the Wellenreiter, launching torpedo after torpedo, and everyone onboard watched the Nazi ship explode. Winn, Felicity, and Iris exchanged concerned looks as Harry and Lena looked at each other worriedly.

Then a breach opened up behind them, and everyone spun around to see Cisco jump out, Caitlin, Amaya, and Zari with him. "Nailed it!" he whooped, taking off his goggles.

Winn whooped as well, and Harry sighed in relief as Lena laughed in delight.

***

Barry shoved Thawne against one of the pillars of the bridge, holding him there with one hand and vibrating his other. "Go on," Thawne gritted his teeth. "End it. End it!" Barry narrowed his eyes, still vibrating, before he stopped. "What's stopping you?" Thawne frowned before he smirked. "Oh . . . I forgot. Barry Allen is above killing. Isn't that right?"

Barry narrowed his eyes, then let Thawne go, backing up. "Get out of here," he ordered.

Thawne stepped past him, turning to look at him. "I wonder what face I'll be wearing next time we meet," he said softly. "Flash."

"Can't wait," Barry answered coldly.

Thawne smirked, then ran off in a burst of red lightning.

***

Kara flew up to engage her doppleganger again, only to stop in confusion when Overgirl suddenly thrashed in midair, reaching for her head. "What the?" Clark asked in surprise as he and J'onn quickly stopped.

***

"I'm detecting dangerously high radiation levels," Gideon announced.

"Disembodied computer voice lady's right," Cisco gulped, looking at the scans on the controls. "Supergirl-X is about to go supernova!"

"Supergirl," Harry called. "Your doppelgänger's about to have a meltdown!"

***

Kara's eyes widened in horror as bright light burst from various places on Overgirl's body, and her mask retracted, revealing her pain-twisted face as she cried out helplessly. "What do I do?" she asked.

"You need to fly her up!" Harry answered. "Up . . . and away! Now!"

Kara took a deep breath, then grabbed Overgirl and flew high into the sky, Clark and J'onn watching as they became blurs.

***

"Oh, my God," Alex whimpered.

Laurel and Dinah quickly whirled around, their eyes drawn to the two. All across the battlefield, the heroes were slowing their battles and turning to see what was happening. "Is that – ?" Palmer began.

"Kara," James whispered worriedly.

Slade, Malcolm, Sara, and Firestorm all looked up, Sara covering her mouth with one hand. "Come on, Kara," Malcolm whispered.

***

Just as the solar radiation took over Overgirl's body completely, Kara breached the atmosphere and tossed her into space. She turned to fly back down as Overgirl exploded, only to scream when she was caught in the shockwave.

***

If the two flying hadn't caught everyone's attention before, the explosion did. Barry skidded to where Alex had gasped, her face pale. "Oh, my God," Laurel breathed as Dinah let her staff rest on the ground.

It was also what made the fight between the archers stop. Black Arrow instantly spun, his mask retracting, and his eye widened when he saw the explosion. "No!" he cried out.

As his doppelgänger sank to his knees in grief, Oliver backed up, drawing an arrow and aiming at his back. Slade and Malcolm turned, reaching for their weapons, but Oliver silently shook his head. He didn't like at all what Black Arrow stood for, but he understood grief just fine. If it had been his Kara that just exploded, he would have wanted a moment. He doubted Black Arrow would have given it to him, but he could.

Black Arrow took several deep breaths before he growled. "I'm gonna kill you!" he roared, spinning around and reaching for an arrow.

Oliver released his before he even grasped one. Black Arrow froze as the arrow went through his heart, and Slade and Malcolm relaxed as Oliver lowered his bow. "That is for Kara," he growled.

His doppelgänger toppled dead onto the police car next to the van, and Slade looked up at him. "You OK, kid?" he asked.

Oliver blew out a breath. "I don't know," he admitted.

"Kara?" Lena's voice suddenly broke through over the comms, and she sounded scared. "Kara!"

"Supergirl?" Harry joined in.

"Guys, she's not responding!" Cisco shouted.

Barry skidded into view, and he looked up into the sky, swallowing hard. "She's not slowing down!"

"What?" Oliver jumped off the van, running to join Barry, all of the others running down, too. When he saw Kara in freefall, he swallowed hard. "Oh, God."

"Kara, wake up!" Alex shouted as the Waverider swooped down.

"We can't do anything to stop her!" Harry called.

Then a blur of blue caught up to Kara just before she hit the ground, and everybody looked away as dirt flew everywhere and the ground trembled. When the cloud cleared and everyone looked back, Clark rose from his crouch, grinning down at his cousin, who was sputtering in his arms, spitting dirt out of her mouth. "Wha – ?" she looked around in confusion. "What?"

"Honestly, Kara," Clark grinned down at her. "Who other than the Man of Steel to catch the Girl of Steel?"

Kara stared at him, then let out a hysterical laugh as she buried her face in his shoulder. Clark smiled and set her down on the ground as the others sprinted to join them. "Thank God," Oliver grabbed her and hugged her.

Kara clung to him tightly as J'onn flew down. "I thought that was gonna kill me!"

"Yeah, me too," Oliver nodded. "I'm glad you're not."

"Me, too," Kara agreed, pulling back and kissing him hard.

Oliver kissed her back as the rest of the heroes celebrated, Firestorm, Palmer, and Terrill flying into the air to sweep for any remaining Nazis.

***

Ah, sweet victory. Always a relief, isn't it?

There are still probably going to be at least a few chapters before the epilogue, so stay tuned, everyone!