It's the first battle with everyone's favorite heroes against the Nazis, with some big surprises along the way.

Enjoy chapter seven!

***

The Nazis all started firing at once, and Barry flashed to the back of the church, snatching the bullets before they could hit any guests. He dropped the bullets back at the altar in disgust as Felicity immediately ran to the side. Jax and Stein stepped into the center of the aisle, clapping hands and merging into Firestorm.

Kara leaned down and ripped a tear in the skirt of her dress as Firestorm unleashed on the Nazis, and she whipped her glasses off, running down the steps. "Get everybody out of here!" she yelled.

"Go," Barry pointed to Wally as Oliver ran down the steps, too. "Get 'em out, OK?" Wally nodded, zipping off, and Barry rushed to Iris. "Hey," he crouched down in front of her. "I love you."

"I love you," Iris whispered back.

"Go," Barry ordered.

Iris nodded, running off to join Felicity.

***

"Out!" Harry shouted, he and James collaborating to get guests out of the church. "Out! Out!"

"Everybody out!" James joined in, barely flinching as Barry and Wally started flashing guests out of the church, Winn running past to help the girls.

Lena pulled a handgun out of her purse as Alex followed Kara's lead, tearing a slit in her skirt. Sara and Thea did the same thing, and Thea ran to watch James's back as Sara and Alex ran to engage the Nazis.

***

Cisco peeked over the front pew, then looked at Caitlin. "I think it's time you introduced these guys to your mean roommate."

Caitlin swallowed, then nodded. When Cisco looked back from taking off his suit jacket, her eyes were completely silver, her hair snow white. "Where does she get these outfits?" Killer Frost hissed before standing up.

Mick did a double take as Killer Frost shot ice blasts from her hands, then grinned. "Ah, that's what I'm talking about!"

He stood up, standing in the aisle, using his heat gun and sending flames at Nazis that came too close.

***

As Sara and Alex started punching out Nazis that decided it was a good idea to take them on, two soldiers found a woman cowering off at the side. Wally quickly sped in front of her when the Nazis fired, catching all of the bullets and throwing them back into their guns, grinning when they failed to fire again. When they finally got their triggers working, their guns exploded, sending them flying backwards.

Kara strode up the aisle, glaring at the woman in black. "Who are you?" she called.

"Come find out!" she responded, flying forward.

Kara flew forward to meet her, and they collided in midair, flying through the roof of the church. The woman in black kicked Kara to the ground, and she landed with a sharp cry. She quickly rolled onto her back, watching the woman in black descend, her cape and hair billowing behind her ominously.

***

Oliver dodged bullets, he and Lena hurrying to find better cover. "Some wedding," Lena grumbled.

"That's why we come prepared," Oliver said grimly, looking around. Kara was handling the woman in black, and he could see Prometheus looking around. That left the archer in black, and when he looked up to the balcony, that's where he found him. Oliver narrowed his eyes, then extended the bow he had under his jacket as Lena looked through Alex's purse.

***

Kara grunted as the woman in black smashed her against the wall, then flew her the other way. Kara quickly rolled out of the way as the woman punched, her fist forming a small crater in the stonework. Kara threw a punch of her own, sending the woman in black into the air, and Kara flew up after her.

***

Sara launched herself onto one of the Nazis, swirling around the soldier before kneeing him in the groin, bringing him to the ground. She tossed him away, then looked up as Alex hurried to join her.

Alex swallowed as the swordsman in all black walked to confront them. She knew exactly who this was based on descriptions from Kara. "Prometheus," she breathed.

"Who?" Sara frowned.

Alex just shook her head as Prometheus came to a stop in front of them. "One wedding, two funerals," he said in a distorted voice.

***

As Lena started firing at Nazis that came too close to her, Oliver stood up, watching the archer line up a shot. He turned to see where it would fly, and he saw Harry helping a group of stragglers. The archer fired, and Oliver aimed carefully, firing his own arrow.

The two arrows clattered together and fell to the ground, and Harry turned around at the noise. Oliver nodded to him, and Harry nodded back, he and James running out.

***

Sara smirked at Prometheus, revealing the gold chain she had picked up from somewhere, and Alex had to give her credit for her makeshift ball and chain. "Wanna fight?" Sara asked smugly.

Prometheus just ran forward, and Sara whipped into action, lashing out with her makeshift weapon. Prometheus deflected, and Sara twirled around as Alex dove into action, she and Sara both alternating hits on Prometheus, though he was holding his own well.

Alex could now understand why Kara hated the guy so much.

***

Cisco turned around as Firestorm launched fireballs at the Nazis behind him, and he blasted one of the Nazis trying to approach from behind. He sent a silent apology to the designers for the wedding as the very nice arch collapsed under the weight of the Nazi sent back into it.

Mick kept using his heat gun, sending flames at the Nazis. Killer Frost extended a large icicle from her arm, slashing through Nazis like they were butter.

***

Kara and the woman in black soared into the air, and Kara saw the woman in black's eyes glow through her mask. She quickly shot her own heat vision just as the woman in black shot hers.

The beams met in the center, and Joe watched in shock as Kara struggled to keep the beams away from her, she and the woman in black slowly rotating, neither giving way to the other.

So focused on the fight was he that he completely missed the blonde metahuman running past him into the church, nor did he see the two men that ran in after her.

***

Prometheus kicked Sara away from him, then got a lucky swing with his sword at Alex. She yelped, falling down, and her eyes widened when Prometheus raised his sword. "Alex!" Lena screamed, making Oliver turn.

Before anyone could do anything, a loud scream pierced through the fighting, and all throughout the room, glasses started shattering. Lena groaned in pain, grabbing her ears, even Oliver wincing at the sound.

Sara, however, could only watch in shock as Laurel stormed down the aisle, her eyes focused on Prometheus. "Ohoho, I don't think so," she shook her head, standing protectively in front of Alex.

Prometheus looked at her and seemed to freeze. "You."

Laurel smirked darkly as she flicked her hand, and a dangerously sharp knife slid into her hand. "Me."

"Alex!" Lena shouted.

Alex rolled onto her stomach, and Lena slid a familiar set of weapons to her. Alex rolled forward, picking up her brass knuckles and sliding them onto her hands. "All right," Alex got to her feet, clenching her hands into fists. "Let's kick his ass."

"Oh, yes, please," Laurel purred, and she and Alex charged at the same time.

***

Thea grinned as she watched Laurel and Alex take on Prometheus, the swordsman seemingly off his game after the appearance of Laurel. "Weren't expecting that, were you?" she grinned.

There was a grunt of pain right behind her, followed by another, and Thea quickly turned to see two Nazis behind her drop. A third followed after them; all three had ebony arrows in their backs. She looked up to see Malcolm run around the back, drawing his sword. "Here!" he shouted, tossing it to her.

Thea grabbed it hilt first, spinning it around before slashing at the Nazis, Malcolm shifting to watch her back, father and daughter working together.

***

Oliver heard a gurgle behind him, but he didn't need to look behind him to see who was watching his back. "Nice of you to show up," he remarked.

"How could we miss out on Nazis?" Slade smirked.

"Good point," Oliver conceded, watching with a critical eye for anywhere he might need to pitch in.

Wally flashed past, knocking out another group of Nazis, before catching an arrow heading right for his face. He grinned, about to run off again, when red electricity of some kind came from the arrow, and Wally collapsed on the ground. "What the?" Slade looked around.

Oliver glared at the archer in black, then turned, looking around. "Cisco!" he shouted, getting his attention. "Up top! We need a breach!" Cisco nodded, opening one up right in front of Oliver. "With me?" Oliver gave Slade a quick look as he nocked an arrow.

"Like old times," he confirmed.

Oliver grinned, and the two of them jumped through. Slade landed in a crouch, Oliver firing an arrow at the archer as he landed. The archer swung his bow, deflecting the arrow with ease, and Oliver and Slade charged at the same time.

***

Laurel tucked and rolled, slicing through Prometheus's knee, making him growl in pain and turn to slash at her. Sara got in the way, holding out the chain she still had, and Prometheus sliced through that instead of Laurel. He turned to take on Alex, but she simply raised one of her brass knuckles, catching the sword between two of the claws. She twisted her wrist and yanked, and pulled the sword clean out of his grasp. Sara gave him an uppercut in the jaw, and Laurel smashed her fist into the back of his head.

Prometheus collapsed on the ground, and Laurel panted, shaking her hand out. "That was really satisfying," she grinned.

"I bet," Alex laughed, high fiving her.

Sara looked up from Prometheus and swallowed as Laurel turned to her. "Laurel?" she asked quietly.

Laurel's smile faded slightly. "Hi, Sara."

***

Oliver's bow clacked against the archer's as they exchanged blows, and Oliver had to admit, he was impressed with how the archer was doing against both him and Slade. No matter where either of them tried to land a hit, the archer either blocked with his bow or took the hit somewhere easy. He saw a flash of metal, and his eyes widened. "Slade!"

His warning came too late, and the Australian yelled in pain when the archer dug a flechette into his side. Oliver leapt at the archer, but now that it was one on one, the archer was able to focus entirely on him. He delivered a swift kick to the back of Oliver's leg, making him buckle, and he grabbed Oliver by the shoulder, shoving him against the railing, pressing his bow against his throat.

The shattering of a window made Oliver attempt to turn his head, but he got enough of a glimpse to see a blur of pink and gold smash through the remains of the altar decorations and collapse. "Kara!" he shouted, drawing everyone's attention to the front.

One piece of wood hit Cisco in the head, and the metahuman slumped to the ground, unconscious. Barry ran forward as Nazis approached, and he punched all of them out, turning to look at Cisco. "Kara!" Lena ran around the pews, Alex and Laurel with her, Thea and Malcolm coming from the other side.

Kara struggled to her knees, coughing in the dust billowing up. She heard Thea's sharp intake of breath, then Malcolm growled, "Stay away from her!"

Barry whipped his head sharply to look at Malcolm, but Kara tensed when she heard the woman in black behind her. "Stay down."

Kara narrowed her eyes, taking deep breaths, her eyes flicking up and around. She saw Alex and Laurel prepared to charge, Sara seeming in shock from having her sister's doppelgänger in front of her. Malcolm and Thea stood as a united front on the other side, Thea with her sword raised, Malcolm's aim unwavering at the woman in black.

And up on the balcony, Oliver was pinned by the archer in black.

Kara narrowed her eyes, then growled and stood, turning quickly. The woman in black had no time to react as Kara brought her hands together in a clap.

The shockwave that emitted from it sent Barry flying back, Laurel, Alex, Malcolm, and Thea crying out as they were sent into the walls. Kara watched in satisfaction as the woman in black collapsed, rolling down the steps, landing in a heap. Kara watched her struggle and try to stand, and she stormed over, hauling her up the rest of the way, then sucker punched her in the abdomen. The woman in black cried out in pain, rolling down the aisle, landing limply by the doors. She didn't get up, twitching in pain.

The archer in black suddenly released Oliver, making him double over, getting his breath back. The archer hurried to the railing, looking over and down at the woman in black. "No!" he shouted, launching over the railing. He carefully picked the woman in black up, her whimpers still audible as he put her over his shoulder. "Fall back," he ordered, looking around at the remaining Nazis. "Everybody, fall back!"

The Nazis obeyed at once, running to join him, and the archer slammed something into the ground. Barry covered his eyes at the massive flash of light, the others doing the same. When the light was gone, so had the Nazis.

Barry looked towards the doors in shock, then Mick grinned and declared, "Best wedding ever!"

A moan of pain behind him made him turn, but it was Malcolm's shout that made Barry do a double take. "Kara!" the assassin burst forward.

Kara whimpered, reaching for her head, swaying on her feet. She toppled just as Malcolm reached her, and he caught her just before she hit the ground. "Oh, my God," Alex ran forward as Oliver and Slade leapt down. "Kara?"

"Kara!" Malcolm insisted, adjusting his hold on her so she was leaning against him.

"What did she do to her?" Thea demanded.

"I don't know," Malcolm shook his head as Oliver pushed past Barry, the others still frozen at the sight of three supervillains in their midst. "We saw their heat vision meet in midair, then we ran in here."

"Kara?" Oliver crouched in front of her, reaching out to cup her face.

"Oliver?" she whispered groggily, tilting her head to see him.

Oliver sighed in relief as Malcolm shifted, handing Kara to him. "Thank God."

Malcolm stood up, narrowing his eyes, then stiffened and immediately swatted with his bow. The knife Sara had retrieved from the ground smacked into the opposite wall, and he glared at the blonde. "We just helped you fight those bastards off, and that's how you start thanking us?"

"What the hell are you two doing here?" Sara snarled, pointing between him and Slade.

"And her," Barry added, pointing at Laurel.

"Yeah, good to see you, too, Red," she narrowed her eyes to slits. "You're welcome, too."

"You're hurting her," Slade snarled as Kara buried her head into the crook of Oliver's neck.

That shut everyone up, Sara looking at him in surprise before slowly turning as Oliver adjusted how he held Kara, standing up with her in his arms bridal style. "Oliver?" she asked in confusion. "What – ?"

"It's a long story," Oliver told her. "Short version is that Kara and I have been together for four months now."

"What?" Barry's eyes widened in surprise.

"Long version includes why they're here," Oliver nodded to include Slade, Malcolm, and Laurel. Kara curled into Oliver more, and he tightened his grip on her. "They're coming with us," he told Sara, a dark tone in his voice making her know not to argue with him. "All three of them. We'll explain when we get back to S.T.A.R. Labs."

"You got it," Malcolm gave Sara a smug look.

"You're not helping," Thea hissed.

Alex sighed, sliding the brass knuckles off her hands before turning to Lena. "I don't suppose anyone bet that a life-threatening situation is how this would be revealed?"

Lena smirked. "I did, as a matter of fact."

Alex snorted, rolling her eyes. "Of course you did."

***

And finally the truth comes out. There's gonna be a lot of explaining next chapter, which should cover the end of the first part of the crossover.

How am I doing? :)