Author's Note: Hi guys, this is something I've had in the works for a while now but just haven't been one hundred percent sure about. However, in light of my unsatisfied Snowbarry and Frostar obsession, I've decided to just be brave and give it a go and see what comes out of it. While this is a Frostar AU, (with a tiny pinch of Snowbarry for good measure) it will follow quite a bit of Earth One's canon in season two. If anything doesn't match season two's timeline then take it for granted that I've altered or changed the details to suit this story. Like for eg; Earth Two's Caitlin will have more or less a very similar background to Earth One's Caitlin, instead of her dropping out of medical school. As always, let me know what you think. Happy reading!

Nova*

War of Worlds

Chapter 1

KILLER Frost walked down the dark hallways with confidence in her abilities, her palms held out at her sides in preparation of facing an unfriendly face. His lair seemed quiet, too quiet for a meta-human so sought out, and she wondered if he knew that they were coming or if he was simply so secure in his own speed that he didn't bother to have minions under his control.

"Frost, you're doing it again." Dr Harrison Wells chastised through gritted teeth, shrugging off a slight shiver as he walked beside her, a small step behind. "The drop in temperature will definitely alert him to our presence."

Killer Frost rolled her arctic blue eyes at Wells but lowered her hands anyway. "Think, Doctor. This place is far too still. He knows we're here."

"She's right, Doc." Reverb said, standing at her other side.

Killer Frost smirked at the only person she could trust today and continued to walk down the dank, dim hallway. A light flickered above them and they all stopped instinctively, surveying their surroundings once more in case there was a threat lurking nearby that they were missing. When the unlikely trio looked to each other, to wordlessly agree that the fixture above their heads was simply faulty, they continued further down the hallway.

"There it is." She whispered slowly, licked her blue lips and then nodded towards the large metal door before them.

The trio looked at each other, nodding in preparation. They had gone through this hasty plan a few times before, but since when had any of their plans gone right. They hadn't been able to stop the particle accelerator from exploding on their Earth, they had not been able to fight off the meta-human powers given to them from said explosion and they had failed to stop a sick speedster from stealing their loved ones from them.

They had been forced to work together again and it felt completely wrong. Yet they could see no other way out. It was the only choice they had if they wanted to survive. While Killer Frost could trust Reverb with her life, Dr Wells had already broken Caitlin's and so she would only fight beside him for as long their goals were the same.

"Let's go, boys." She told them boldly, but deep down she was just as anxious as they pretended not to be.

If they failed to convince him to take the job, then they would return to their perishing Earth like lambs for the slaughter. Killer Frost, Reverb and Wells weren't fools. They knew that even if they did everything the speedster on their Earth asked of them, they would still eventually die by his hand. That was why they were here, on Earth Seven, hoping to bargain with the lesser of two evils, because surely he had no interest in destroying worlds.

Killer Frost lifted her hands, icy vapour forming around her wrists and she aimed it at the door. She fired her fingers at the metal, like an experienced witch casting a powerful spell, and it froze before them, shattering into a million pieces after mere seconds.

"We could have just tried the handle." Reverb told her with poorly disguised amusement at her melodramatic antics.

Killer Frost looked at him with a wicked grin while Wells rolled his eyes at the pair. "Where's the fun in that? Besides, I like to make an entrance." She shrugged easily in her black, leather top.

She and Reverb held up their hands in defensive positions while Wells repositioned the thick, black strap of his modified gun more securely across his chest. The room before them was dark and they walked in carefully, trying to adjust their eyes to the lack of light.

"Can you even see through those glasses?" Wells directed at Reverb and the breacher snorted in affront.

"Of course. Infrared, Doc. Infrared." Reverb replied smugly.

"Of course." Wells mimicked dryly and Killer Frost rolled her eyes at Wells' stupid question. He should have known better than to doubt Reverb, the best mechanical engineer in the entire Multiverse.

If Wells hadn't been so darn intelligent and with his own axe to grind against Earth Two's speedster, then she would have preferred to work with Reverb alone. However, she and Reverb knew that Wells' experience and vast knowledge on meta-humans would prove invaluable in their situation. He also held an iota of leverage with Zoom, which meant he was almost invaluable to them. Suddenly the light in the room flickered on, dimly lighting their surroundings and bringing Killer Frost out of her reverie. The trio spun around simultaneously but found the room empty. Killer Frost frowned.

"Okay, that's cool." Reverb smiled excitedly and Killer Frost couldn't help but smirk over her partner's enthusiasm. Reverb always did enjoy meeting meta-humans, mostly because he liked naming them a little too much.

Dr Wells was definitely feeling intimidated by the tiny drop of perspiration making its way down the side of his face. "I bet you wished I was using my powers now, don't you, Doc." Killer Frost said sarcastically and Wells' jaw twitched but he remained silent, refusing to let her rile him up like she normally did.

Reverb walked around the room, his fingers caressing the peeling paint on the walls he touched. "He's definitely here." The breacher told them with a cheshire grin, as if he were sniffing out a rat in hiding.

Killer Frost looked around the barren room with a disdainful scrunch of her nose. "This place is probably just a front for where he's really hiding." She said astutely. Although she did not admit that she was failing at finding an entrance, apart from the one they had just busted through.

Reverb made a humming noise in agreement. "He's definitely watching us." The thought seemed to thrill Reverb.

"There." Dr Wells inclined his dark head at a small, black camera looking completely out of place in the dilapidated room.

Killer Frost lifted up her dainty chin and puckered her blue lips, aiming her mouth straight towards the camera. Her blown breath was a controlled snowstorm that frosted over the security device.

"Would you stop destroying everything we come across?" Dr Wells berated sharply and Killer Frost pursed her lips at him but ignored his scolding, refraining from commenting on it – for now.

"Why don't we just start tearing this place down brick by ugly brick?" Killer Frost suggested unhelpfully. "It looks to be on its last leg anyway." Her pouty, blue lips curled up in distaste.

Reverb turned to look at her with consideration. It was difficult to tell what he was thinking when his eyes were masked by glasses with reflective blue lenses, but Dr Wells groaned inwardly when he noticed a wicked grin light up the breacher's face.

"Ten points for every piece of rubble that goes in Dr Wells' direction?" Reverb challenged.

Wells was in no doubt that the crazy pair of meta-humans he had created was being serious. They would definitely use him as target practice for their own entertainment.

"Would you two idiots stop fooling around and just call out for the speedster." Dr Wells groused sternly, not in the least intimidated by their devilish antics.

He may not posses any striking, inhuman abilities, but his own weapon could turn solid brick into ash in a split second and he was willing to bet his life on his aim. He was confident that he could handle Frost and Reverb coming at him with chunks of stone at the same time. Neither was Wells afraid for his life because he knew that the pair of temporary allies would not kill him. It wasn't just because they needed him right now, but because for all their dislike and contempt towards him, they respected him. They did and so did the people they used to be.

"Twenty points." Killer Frost said wickedly, no doubt annoyed over being addressed as an idiot. Reverb lifted his hand slowly but before any damage could be made to the building, the air shifted around them but it was not from Reverb's doing.

"I wouldn't do that if I were you." A silky voice drawled out lazily.

Three heads turned in the direction of the soft tone, steady in the presence of danger. Standing in a corner he was shrouded in darkness but his figure was no less intimidating. Shadowed in the dim light from the room they stood in, Killer Frost noticed his broad shoulders, lean waist and long, long legs which made him look every inch a speedster.

"Oh, and why's that?" Killer Frost took an inquisitive step forward. She had never been able to curb her curiosity.

"Because I actually happen to like these ugly bricks and I would hate to have to go looking for a new place of business." His voice was low, confident and almost sinful. "Besides, you've already taken out my front door and security measure and I'm starting to think that you're a lot more trouble than your worth."

Reverb snorted beside her and she shot him an icy glare. He pretended not to notice, because even though he was technically her commander and she would follow his orders without question, but on a personal level, as a female, she was darn scary.

"Come into the light." Killer Frost demanded, ignoring the speedsters open insult, and surprisingly he took a casual step forward.

He was taller when closer to her, his dark hair falling onto his forehead. The side of his face was heavily scarred and the milky, marble eye he wore made his murky green one more intimidating than what it should be. His black clothing only added to his raw strength and she almost felt the urge to shiver. She, Killer Frost. It was almost funny. Almost. She would definitely give him points for intimidation.

"Nice face." She told him candidly, her voice husky and not brutal, refusing to let him see that his sinister but confident presence was unsettling. "Very pretty." She could have been referring to the one half of his attractive, unmarred cheek but they both knew that she wasn't.

He gave her a dark chuckle and suddenly he was right in front of her, his inhuman speed making her hackles rise. She was used to this sort of speed from Zoom, the speedster on their Earth, who often used his ability on her as a threatening manoeuvre. So he was going to be disappointed if he thought a little windswept hair across her pale cheeks would scare her.

"You too." He told her, his nose so close to hers that they were almost touching. "What's surprising though is that your pretty face managed to hide even the tiniest of flinches."

"I'm not threatened by your speed, Savitar." She told him defiantly and his dark eyebrows arched at her claim. Suddenly he was gone, no longer towering menacingly over her.

She turned around to find him standing in front of Dr Wells. While Savitar's stance was casual, observing, the way his long fingers clenched an unclenched at his sides and the stiffness of his spine suggested that there was no love lost between him and Wells. She inclined her white head to the side. It seemed like Wells would be Wells, no matter what Earth they visited. Begrudgingly respected but always loathed.

"You're supposed to be dead." Savitar said mildly, yet she heard the undertone of anger in his voice and she was impressed to see Wells look on at him with a blank expression.

Savitar's face was ghastly. Being up-close and personal with that scarred mug, even for a second, could make one wet himself if unprepared for the crudity of burned flesh, which Killer Frost suspected happened often because of Savitar's inhuman speed. Yet, like herself and Reverb, Wells was no stranger to the imperfections of people, not from where they come from. Some, like Killer Frost and Reverb, had the same ugliness as Savitar did. The only difference between them was that he wore his on one half of his face for the entire world to see, while there's was hidden. He was unashamed of who he was because Savitar had only one personality in this world. Killer Frost and Reverb had to suppress who they used to be in order to become what they were now.

"I'm not the same man from your Earth." Wells said simply and she noticed the slight sinking of Savitar's broad shoulders. He turned around at human speed to look at Killer Frost and Reverb before his lips curled into a smirk.

"Ah, breachers?" He concluded shrewdly and she raised a perfectly shaped, white eyebrow at him. "Where from?" He asked casually and she wondered if he had many clients who came to him from other worlds. It wasn't impossible, but from their research on him, he mostly worked on his own Earth.

"We're from Earth Two." Reverb told the speedster, speaking for the very first time. Killer Frost knew that his silence had only been because he was trying his level best to get a read on Savitar. She wondered if he had managed to pick out anything useful. Weaknesses made manipulation so much easier.

"What do you want here?" He asked slowly.

She turned around at his voice. He had moved away from Wells now and was lounging against a peeling wall again and she looked over at Reverb and Wells. They both gave her an encouraging nod. She rolled her big, blue eyes at their lack of verbal assistance. Weren't they supposed to be the men on the team?

Killer Frost turned to look at Savitar. His one foot was propped up against the wall, knee bent, and his arms were crossed against his broad chest as if he had all the time in the world. She supposed he did, considering time could move at a snail's pace for him if he wanted it to. For a moment she felt envious of his freedom. While she had no qualms about following Reverb's orders, because she knew at the end of the day that they were a team, it had only recently come to light how trapped she really was. After all, Reverb was doing Zoom's bidding and they had finally learned that there really was no greater purpose or grander world where Zoom was concerned.

In fact, if Zoom got his way, there would be no worlds left. Killer Frost frowned as she thought about how someone such as herself, with incredible powers, had been powerless when faced with Zoom. No more though. To a novice, someone who lived life innocently, it would seem that Savitar was watching her with disinterest on his face, however she was neither so she could tell that his intense gaze, which never left hers, was curious.

"There is a speedster on our Earth, Zoom, who is threatening to tear it apart. As powerful as we are, only another speedster has the ability to stop him." Killer Frost told him honestly, coming straight to the point. Usually she loved playing games but time was of the essence now. As much as she could, she would not lie to him. This would make it easier in the long run.

"Why come to me then?" He asked astutely. "There must be plenty of others like me out there. Breacher over here could easily open up a portal to any one of the numerous worlds in the Multiverse." It was an expected question, a fair one.

He nodded towards Reverb, acknowledging the breacher for the first time and Killer Frost saw Reverb's stance straighten. Clearly Savitar was just as well educated on meta-humans as the Barry Allen Zoom was so fascinated with was.

"You're the only one who might be fast enough to stop him." Killer Frost said softly, her voice almost coaxing, as if a nicer approach would help their cause and lessen the blow.

"Might be?" His half smile was clearly disbelieving, as if he thought she was simply baiting him into taking the job by playing on his pride. She wasn't. Zoom was beyond what Savitar or the Flash considered fast.

"Yes, might be." She tried her best not to sound bitter. "Which there is no point in arguing about because that could be easily changed if you agree to accept our offer."

"Why would I want to do that? Stop this Zoom, I mean." Savitar straightened off the wall and walked towards her slowly, her earlier commentary on him not being the fastest momentarily forgotten. Was he considering doing it? "Or better yet, why would you? Why not join him?"

She held her ground, ignoring his second question. "We know you do ample research on your target before you take them out, Savitar. You have your own sort of twisted code that you work by, but trust me when I say that even by your standards, Zoom is the lowest form of evil there is and death would be a kindness for him." Killer Frost told him impassionedly. "Plus, besides the fact that we are willing to pay you handsomely for your successful efforts, we're offering you the opportunity to be the best there is and to expand your business. Or would you rather be confined to this backwater world when there's an entire Multiverse out there who could use a hit speedster."

There was a long pause as Savitar regarded her with keen eyes. He was measuring her words and she knew that she had his full attention now. "Seems almost too good to be true." His voice was cynical and Killer Frost reigned in her temper, reminding herself that this was one of the reasons why they had chosen him.

Savitar's dark code of honour and realistic view of the Multiverse was far better than Earth One's Barry Allen's need for rainbows and unicorns. She couldn't work with someone who made her puke every time he opened his mouth and said something noble.

Reverb addressed Savitar knowingly. "Gods aren't meant to be restricted."

Killer Frost kept her eyes trained on Savitar even though she desperately wanted to look over at Reverb. Whether it was due to his type of powers or not, Reverb had the uncanny ability for picking out a person's innermost desires instantly.

"Ah, are you a psychic too?" Savitar queried mockingly and this time Killer Frost did look over at Reverb. She was pleased to see that he was grinning at Savitar's insult, which meant he knew he was right about the speedster. Killer Frost hid a pleased smile.

"It's called Dimensional Awareness." Reverb corrected. "But we digress. Let's get back on topic, shall we?"

"Yes, lets." Savitar agreed before moving at inhuman speed again. "What's in it for you? Or you?" He moved quickly to stand before Dr Wells, giving the older scientist a look that was equal parts amusement and disdain, before reaching Reverb. Killer Frost narrowed her eyes as she saw Savitar's fingers fist at his sides before relaxing.

"Like Frost said, we want out from Zoom's reign. His methods are slightly … medieval." Reverb spoke causally.

"You've seen you're future, haven't you?" Savitar spoke softly, a sadistic grin tilting his firm lips. "With all that Dimensional Awareness and all."

Reverb glared at the speedster this time, refusing to give Savitar the satisfaction of agreeing with him. Savitar watched the unlikely trio share telling looks amongst each other. For all their obvious animosity and mutual dislike towards one other, they were putting up a very united front.

"Listen, buddy, we're offering you the opportunity to be the fastest there is. Not just on your pathetic excuse for a world, but possibly across the Multiverse. Don't be a fool, take the deal." Killer Frost said coldly but her intimidation seemed to have less of an effect on the speedster than her playing nice earlier on had.

Savitar gave them all a wry grin. "Must be nice, traipsing around the Multiverse, with free boarding passes and bottomless pockets … " He trailed off with pointed looks at Reverb and Wells before shrugging his broad shoulders unconcernedly.

Killer Frost frowned at him. "What does that mean?" She imitated his careless shrug in frustration.

"It means you made this trip for nothing." Savitar told her plainly. "I'm not interested."

Killer Frost took an annoyed step forward. Wells reached for her shoulder and while she shrugged off his hold irritably she stood still. "Why the hell not?" She demanded heatedly. "This is your job. We're not asking you for a favour."

Savitar turned around slowly, eyeing her up and down. "I decide if it's a job." He told her coldly, all traces of his dark humour having vanished. "This isn't my fight."

"Then we'll make it yours." She said acidly. "We will tell Zoom that he's wasting his time trying to get Dr Wells here to steal the speed from Earth One's boy wonder. I'll let him know that there's someone here who's much, much faster than the speedster he's currently after."

He was in front of her again, his teeth bared viciously. "I could kill you all, right now you know."

"You could try." Reverb spoke up as Killer Frost fumed at the threat, preparing to fight, if need be. "But I will open up a breach so fast that you won't even be able to snap Frost's neck here before you're deposited into a world far worse than the useless one you're currently stuck on." Reverb held up his hands threateningly.

Savitar took a small step back, eyes roving between the three people who had busted into his lair, seeking his speed. Their offer was more than tempting and he wouldn't have thought twice about taking it if it had come to him in any other form. Yet something about this situation did not sit right with him. It was exactly like he had told Frost earlier; this particular trio looked to be more trouble than they were worth.

Frost was too agitated for someone who was supposed to be made of ice. Reverb and Wells, while better skilled at hiding their emotions, were reeking of something that smelled a hell of a lot like desperation. Then there was the question of why three people who clearly had issues with each other would work together? Why was it so important to get rid of Zoom? They could have simply just fled from Earth Two. They had the means, they were on his world after all. There was definitely a hole in this plot, yet he wouldn't waste his time asking what it was because he knew he would not be afforded the truth.

He feigned a confused frown at the mismatched trio. "So why not infiltrate Earth One and get the aid of … what did you call him now? Ah, yes, the boy wonder there?"

Reverb pursed his lips as if he found the question distasteful. "Firstly, Zoom is already on the inside and we can't alert him to our plans. Secondly, let's just say that the speedster on Earth One doesn't exactly share our values."

Killer Frost snorted at this and Savitar looked over at the blanched expression on Dr Wells face. The scientist was trying his best to hide his disapproval but Savitar saw it well. "You mean he isn't a killer?" He deduced wisely.

This time Dr Wells did wince. Killer Frost examined her black nails as if bored with the conversation already and Reverb shrugged as if killing someone wasn't a big deal. And Savitar suddenly understood exactly why they needed him. This was his job. He got rid of the scum that plagued the Multiverse, and if Frost was to be believed, then this Zoom was exactly the type of people he went after.

However, she had mentioned that Zoom was faster than he was. Could this be true? The fact that there were other speedsters in the Multiverse was enough to set his teeth on edge, but to think that they were stronger than him, that challenged a part of him that he had worked so hard to snuff out. The insecure feelings of never being good enough reared its ugly head for a moment and Savitar inhaled sharply to shove it back down. Of course he had known that it was a possibility for other speedsters such as himself to exist, yet in his world and from the extensive work he did, he had not once come across another speedster. He had truly started to believe that he was the only one of his kind created, that for all his pain and suffering in the past, he was finally special. He was the God of Speed and that was why he named himself Savitar.

Now he learned that there was not just one speedster running rampage out there, but a second one as well. Neither was Savitar impressed by Frost's certainty of Zoom being faster than he was. This possibility alone spurred something primal and deep-seated within him. A burning need to prove himself the best, to prove that he was worthy of his speed caught fire in his chest. He also had to admit that the idea of facing another speedster, testing his own limits, was one that he was finding very difficult to resist.

Then there were also Zoom's intentions to consider. If Frost was telling the truth, and Zoom really was seeking to steal the speed from other speedsters, then this was definitely his fight. Savitar's speed was his and only his.

Savitar's eyes roved over the three people standing in his lair. If they proved to be too much of a nuisance then he could always just get rid of them once they had served their purpose. And he definitely had a new purpose for them now.

He smirked slowly, darkly. "On one condition." He said arrogantly. He was fully aware that without him on their little team of misfits that they were doomed to failure.

"Our terms are not up for negotiation." Killer Frost snapped in frustration.

He turned his mismatched eyes on her. She gritted her teeth as he gave her an amused smile. "You know, Snowflake, for an ice princess you sure have quite the temper, don't you? Why don't you go sit in a corner while the men talk?" His words were meant to get under her skin and he was pleased when he succeeded.

Reverb shook his head next to Frost, wincing slightly, and Dr Wells slapped his forehead with the palm of his hand. Frost's eyes flashed white for a second as she raised her hands in attack. There was no point in unleashing her wrath though because Savitar was no longer standing before her.

Killer Frost felt him behind her the moment her flesh tingled and the air around her swished. She turned around quickly only to be drawn against him by her arms, his efforts not really rendering her useless but reminding her that fighting him would prove futile. His long fingers dug into her flesh as he lifted her so that she was standing on the tip of her toes, even with her heeled boots. He made their noses touch by lowering his horrid face because he was still that much taller than her.

Reverb was at her side instantly and even Wells pointed his gun at the back of Savitar's head but the speedster just grinned down wolfishly at her, not in the least alarmed, his menacing eyes never leaving her own. Her blue gaze moved from left to right, challenging his control, taking in every inch of scarred flesh and gold specks in his one green eye.

"Play nice, Snowflake, or I just might be tempted to do something we'll all regret." He whispered gruffly.

"Let her go, Savitar." Reverb demanded authoritatively, deciding that the theatrics between the pair had gone on long enough. He already had to deal with Killer Frost and Wells' continuous bickering; he didn't need her and Savitar jumping down each others throats every five seconds too. Was he the only adult in this room?

The speedster released Killer Frost roughly and she stumbled backwards. Reverb placed a strong hand against the small of her back. She had to make do with shooting figurative icy daggers at Savitar though as he raised his hands in surrender before taking a few steps back, moving away from the trio. Savitar went back to his wall, lounging against it with the ease of a man who did not have a care in the world.

"What is your one condition?" Dr Wells' voice was controlled and even.

"After I defeat Zoom, as part of my payment, you will take me to Earth One as well." The trio looked at each other again, frowns appearing on Killer Frost and Reverb's features and disapproval marring Wells' face.

"Fine." Killer Frost snapped out before the other two could agree, obviously uncaring of whatever it was that he wanted on a world that wasn't her own. Savitar hid a grin. He would be the best.

Savitar spared her a small glance before looking over at Reverb and Wells for confirmation. The two men nodded, seeing that Killer Frost had already agreed and they had come this far already. The speedster gave them a satisfied grin.

"When do we begin?"