WARNING: Slash. FlashCold. Love reviews. Suggestions & feedback are very welcome! *Sorry for grammar and spelling mistakes, English is not my native language. Royalty/Medieval AU with Powers. Based off a prompt seen on Tumblr.

Disclaimer: I don't own The Flash characters or comic book series. It is all property of DC Comics and whoever else has legal authority. I am not making any kind of profit from this writing; it is all for fun, freedom of expression and practicing my english writing skills :P

A/N: Hi! thanks for giving this story a chance! Please read this!

****WARNINGS: There is romance and a lot of Barry whump and a lot of ANGST! It has some non-con stuff in later chapters (every chapter has warnings) / mentions of attempted rape/ kidnapping/ torture /violence/ slash/ drama/Eobard Thawne and Hunter Zolomon are obssesed with Barry/ fluff and smut and I promise a HAPPY ENDING! :D So please proceed with caution. You have been warned.

This is a slow built and my first fanfic ever! I promise it gets really interesting in later chapters! Again thank you for reading and for giving this story a chance! Enjoy! :D

CHAPTER 1: THE COLD ALLIANCE

Location: Southern border of the Central Kingdom.

A dark eerie storm coming from the north was threatening the battleground. The strong and unforgiving wind was making the red flags decorated with the golden lighting bolt emblem of the Allen Monarchy, to move in frenzy. Cisco noted how the sound of thunder was approaching quickly to their location. The gods definitely weren't on their side in this campaign.

The young inventor rushed between the soldiers to meet with his Prince in the tent located in the far west of the camp where the war council was going to take place. On his way, he saw that their men were gathering around several bonfires trying to keep warm and to discuss the awful turn of events in their last fight against their powerful enemy. Their morale was noticeable low. 'Not good' Cisco thought feeling the tension of the men.

When he arrived at the grand tent, he found his young friend Prince Barry Allen with a concerned look on his face, studying a map that lay on an old wooden table next to a timeworn oil lamp. It was a look that told Cisco that the fate of the kingdom was at risk.

'Your Highness' – murmured Cisco and bowed, as it was proper.

Barry lifted his green hazel eyes from the map to see his friend and flashed a little worried smile. 'Cisco, you are early…'

Cisco nodded, noticing how weak and tired Barry looked. War had definitely taken a toll on his best friend. 'I know I am early, but the situation isn't good at all. We need to retreat immediately. We can't fight this alone anymore.'

'I am aware of that, but I am at my wits end. He is just to powerful, even for my powers… I have failed the country. Zoom is like… like a demon, and he has destroyed everything in his way. I can't allow him to reach Central Kingdom. I need to protect my country and my family.'

'Yes, I do understand your position, truthfully I am scared as hell, that thing has demonic weird black claws and he is way faster than you, but right now what we need is to find some allies, we can't deal with him on our own, he will destroy us if we stay here. I am sure that Wells will agree with me in this one.'

Barry nodded and sighed in defeat.

'Talking about me?' - Sir Harrison Wells asked with a smirk, while entering the tent followed by Lady Caitlin Snow. 'Cisco you now it is rude to talk behind someone's back.'

'Very funny Wells' – stated Cisco annoyed by the older man.

'Your Highness' – said Wells making a short bow to his Prince followed by Lady Snow that copied his gesture with a warm smile.

'Harrison, Lady Snow, I am glad you are both here before the Council's meeting.'

Barry gestured to his mentor and healer to approach the table. 'We need to do something to stop Zoom, Cisco believes that the right course of action should be to retreat, I think maybe after we retreat we could have a chance of stopping this demon if we ambush him and his army here…' - Barry pointed in the map the glaciers of the north.

Snow watched carefully the map and understood what Barry was planning, but the prince's plan had a slight flaw.

'Pardon for the interruption your Highness –'

The prince furrowed his brow…'Cait, please call me Barry; it's strange hearing my best friends and advisors addressing me so formal when we are alone. It's kind of weird.'

Caitlin smiled. 'Fine, Barry… I am sorry it's just that it is difficult… sometimes I am so worried that I will slip your name so casually when we are in public or at the palace with the nobles.'

Barry laughed wholehearted. 'It wouldn't be the end of the world you know.'

'It will look bad.' – stated Caitlin serious with a pause. 'And you know that…'

'I promise you that you saying my name in front of a bunch of nobles would be the least of my concerns.' – he told her offering her a warm smile. 'But I am sorry, I interrupted you… what were you saying before about the plan's flaw…'

'Oh right…mmm I understand your strategy…' – said Snow thinking…. 'The cold environment will definitely slow Zoom, his speed and healing capabilities, but it will also slow you as well and that is a huge threat, you are the Crown Prince, we can't afford to lose you so we need a really good plan and also I was wondering how exactly are we going to make Zoom interested in going up to the wild lands of the North?'

Cisco nodded. 'Cait is right, the location will affect you too, so you won't be able to catch him there with just your speed and the north is a mystery since King Mick Rory's death two years ago… they have isolated themselves.'

'I know… but taking Zoom to the north is easy… he wants my speed, so I will go to the north and he will follow me there, I will be the bait and then we ambush him there with our army, and stop him once and for all, but I agree with Cisco we need more allies and a weapon to slow him down if we want this plan to work.'

'If your plan is to have allies in the north, I have bad news... I think that's impossible to accomplish…' –said Cait gloomy. 'And by the way taking the Central Kingdom army to the north won't go unnoticed you know, they might take it like a hostile move of our Kingdom against the Winter Realm.'

Cisco laughed. 'That is true. Central Kingdom showing up in the north without a warning might stir a war with the Winter Realm.'

Harrison interrupted. 'I agree with Lady Snow, I wouldn't count with an alliance in the North, is not impossible, but too difficult… so I believe that it would be easier to talk first with the King of Starling, Oliver has always supported Barry and he has been like a mentor, I strongly believe that he would agree to fight with us and maybe help us stop Zoom. Also we could try to create a weapon based on Caitlin's powers as Killer Frost to slow him down… something to do with cold. Maybe a blast.'

They all contemplated the idea in silence. Barry was worried and anxious; he glanced at the map and saw how many villages Zoom had already destroyed with his insanely speed and power. He traced his finger over the map and thought of his sister, Iris, who was going to have a child with Eddie, he needed to protect them, protect his foster father Joe and stepbrother Wally, as well as everything he loves in Central Kingdom, all his friends and their future. He needed to do something and do something quickly.

'I think I may have a really bad idea,' said Caitlin anxiously watching at Barry's direction.

'Now I am curious,' said Cisco grinning. 'I love bad ideas.'

'Last cycle, there was a letter from the north. If I remember correctly I think it was from Princess Lisa Snart addressed to the High Council of Central Kingdom, but the council didn't told you anything Barry, because we all thought it wasn't relevant considering we were at war.' Harrison Wells arched his eyebrows amused knowing where the conversation was going and Snow continued explaining; 'The letter stated that the Princess and the High Council of the Winter Kingdom were looking for a suitable partner for their King Leonard Snart…. and that they are inviting us to the feast they are going to hold in their castle to celebrate also the birthday of Princess Lisa Snart. The feast is this full moon.'

Cisco stared puzzled at Cait. 'Please enlighten me how the hell a party can help us defeat Zoom?'

'What I am trying to say Cisco is that I think we should consider an arranged marriage between Barry and King Leonard Snart.'

There was an awkward silence until Barry burst out laughing and Cisco followed. 'Cait you almost got me there, I thought for a minute that you were talking seriously.' – the Prince said surprised with Caitlin's amusing proposition.

'I am dead serious Barry,' she said quietly looking at her friend and Harrison, who nodded analyzing the idea.

A perplexed look instantly swept all over the prince features. 'WHAT?' Barry asked disbelieving the idea of her friend. 'Cait are you insane? Really? That's worst idea I've ever heard and that's saying a lot considering all the bad ideas Cisco has ever told me.'

The young inventor glared a little bit offended.

'I warned you.' – said Caitlin uneasily.

'Indeed… it is unreasonable. The last thing I knew about King Snart is that he is old and married.' – continued Barry in astonishment. 'And Harrison I can't believe you are even supporting this.'

'He is not that old I think he is forty and two… and he is not married, he was, but not now…' – explained Caitlin slowly. 'King Rory of the Fire Lands died two years ago, some said that he was poisoned and others say that it was from a strange sickness, but the truth is still kept in secret.'

'That sounds really shady, I don't want to see Barry married to an old man who may have killed his husband slowly with poison.' mumbled Cisco concerned. 'That's fucked up.'

The prince sighed, taking a minute to decide what his next words should be. He knew nothing about the Winter Kingdom and his royal family; in fact the whole Winter Realm was a mystery for him.

'What if we seek King Leonard Snart only for an alliance without proposing the marriage… like the alliance with Oliver?'

'It won't work, Barry' said Harrison walking back and forth inside the tent thinking. 'Oliver actually knows you and cares for you, so an alliance with him is easy to achieve, but King Leonard Snart is complicated, he doesn't know you, our countries have little or no commercial trades and after the death of King Rory, Snart decided to hide from the world and that decision has driven his kingdom in to chaos, the northern people are dying, the cold is killing their crops and livestock, they have been isolated from trade routes, they have no allies, and their King is hiding in the shadows. That is why Princess Lisa Snart is trying to reach out for help… And well in the worst-case scenario if a suitor from another country does appear and Leonard Snart marries him, he would be to busy with his new fiancé to worry about an alliance with us…' – said Harrison trying to explain the situation.

'You are telling me that Princess Lisa Snart thinks that an arranged marriage will be a solution to the chaos of her kingdom and the depression of her brother?' – asked Barry confused looking at his friends.

'I believe so, yes.' – Wells answered with a small nod.

'How?' – interrupted Cisco with curiosity. 'And why doesn't she get married? Is she that unpleasant to the eye?'

Wells sighed. 'She needs a strong alliance to save her Kingdom, but Leonard is the King, she is not a Queen and the only thing strong enough to keep two kingdoms together is a marriage between two rulers, alliances can be broken easily but marriage is a stronger bond. They need someone with power or money; Barry would be an ideal choice considering that Central Kingdom is one of the richest countries thanks to its geographical position and commercial trades. We could help their people and Barry being a young prince full of life, may be able to break the frozen walls that King Leonard has built around him.'

Cisco laughed at the last statement. 'That is crazy.'

Barry swallowed hard while thinking in all the variables.

'This…this is the only way isn't it?' – he stuttered with discomfort. He wanted so badly to argue, to deny the idea, but he couldn't find a reason. Caitlin was right and the more he thought about it, the idea of an arranged marriage with Leonard Snart sounded like a beneficial plan for both parties and marriage between to men was not uncommon in neither kingdom. The Winter Realm will have the support of the Central Kingdom with crops, inventions, commercial trades and riches and Central Kingdom will win a bigger and stronger army, Barry would be married to a very dangerous man that could easily kill him with cold if he were to act as an enemy, but with the marriage that wouldn't be a menace and in fact Leonard will become a powerful ally with a similar power to Caitlin's that can slow down Zoom temporally… and lastly there is also the fact that the marriage would be a logical reason to take his army up to the north with a bad excuse of protocol or tradition for the wedding. Everything made sense. He has no choice in the matter.

Barry couldn't help but feel despair. He was standing alone in this mess feeling like a broken man, he was the one that was going to sacrifice his freedom and marry the Cold Demon of the North for a stronger army and allies. He felt like he was fading away. He glanced to the side, where his golden crown lay next to his sword. He could hear the storm outside the tent, the hard drops of water colliding on to the fabric and see the strong white light, striking the camp time-to-time, escorted with the booming thunder that shook the entire ground so aggressively that made the prince heart pound. He was undoubtedly afraid of the future but he had a great responsibility, and there was no choice, so may the gods help him because he was going to do everything in his power to protect the kingdom, even if that meant marrying Leonard Snart to stop and vanish the sick twisted smile of the demon that threatened to destroy everything he loves.

'I will do it.' – murmured Barry taking carefully his crown from the table. 'Harrison… please send a messenger to the north, tell Princess Lisa Snart that we will arrive this full moon to the feast and her party, and that I, Prince Bartholomew Henry Allen, am interested in getting to know his brother. We will discuss this decision next with the war council and I will order the retreat immediately to Central Kingdom to begin our journey to the north.' I will not be afraid of the storm that is coming my way, when it hits me in the core, I am sure it will make me stronger than before.'

Thanks for reading my first attempt at writing fan fiction! Let me know what you think! Love reviews. Suggestions & feedback are very welcome! I appreciate constructive criticism. Next chapter: the Winter King.