(I'll quickly clear up some confusion. The Norse Pantheon theoretically "doesn't exist". For example, Thor is an Asgardian warrior, but not an actual God. The Norse gods are Asgardian warriors or figures named after Nord deities with similar names while the monsters do exist.)

I remember when I was weak, and I hated every second of it. Every day I was constantly ridiculed and treated less than dirt, even my parents and siblings treated me like dirt. That all changed however as I actually blacked out, but that's a story for another day. Right now, I'm in my personal chambers to prepare for a fight. My Queen has asked me to retrieve something stolen from us as Union Academy has a fighter in this arena called the Chaos Arena. The Chaos Arena is a legal arena where fighters can test their might against one another. The Chaos Arena holds broadcast fights once a month, which you have to apply for early to earn a spot there. There are also more scandalous matches where corrupt officials bring captured women to fight Orcs and lust-driven Demons and such to fight and be raped for their own amusement. However that is not my focus, the match I am fighting in is a free-for-all. This means exactly one hundred contestants will be pitted against each other to be the last one left and win a prize. As I said before, my only concern is retrieving something as per my queen's orders. Suddenly, there's a knock on my door.

Y/N: Enter.

(He sounds like Young Kratos)

Through the door comes Queen Frida.

I immediately bow on my knee.

Y/N: My Queen.

Frida giggles.

Frida: Raise your head Fate Breaker, I only came to see if you were ready. Is that the armor you're wearing?

Y/N: Yes

Frida: Cloak?

(The cloak has a wolf head hood)

Y/N: Yes.

Frida: Shield?

Y/N: Yes.

Frida: Your weapon?

Y/N: Yes.

Frida smiles at me and walks away. I follow her but suddenly remember something. Holding up my left arm, since my shield's on the right, I whistle and yell for a piece of equipment.

Y/N: Hugr-Rip!

A metal bird flies to my arm before wrapping its wings around it and turning itself into a charm. 

Frida: I'm glad I finally managed to find a use for that old thing. It sat in my treasury collecting dust.

Hugr-Rip: *glows slightly and makes angry bird noises*

Y/N: It is useful in battle.

Frida: As it should.

We arrive at a stable and I look at my mount. 

Y/N: Gulltoppr.

Gulltoppr is my equivalent to a Warhorse, but much more efficient. Gulltoppr has the ability to charge his horns with the power of the Bifrost for increased damage. He's also really fast and can hold three people on his back, not including me. He's also large enough to handle my size and weight if I wore full plate mail.

I smile and pet him, which earns me a happy lick. Frida's chariot parks itself next to me and she sticks her head out of the window. Despite popular belief, the Nords do have modern technology, but we keep a traditional aesthetic. One of the guards opens the Bifrost gate and I immediately rush through to lead the escort. You see, my job is to not only protect the Queen, but I lead her armies, act as a diplomat, and attend to her needs if she calls me. Some jobs are done by the handmaidens, but I sometimes do their jobs. 

Frida: There are some days when I wonder if I'll grow, but neither Aesir nor Vanir usually grows taller than 6'7.

Y/N: You are an acceptable size already my Queen.

Frida: Not everyone is 8'5 Fate Breaker.

Ah yes, I forgot to explain my appearance. Well, I'm 8'5, as my Queen revealed, with black hair styled into a dread-hawk and an undercut for my tattoos. Speaking of my hair, a couple of my dreadlocks are white as snow. My skin is brown and my eyes are heterochromatic with the left being blue and the right being orange. To top it all off, I'm incredibly muscular from my 2 years living with the Nords.

The trip takes very little time as the horses were bred for this sort of thing and Gulltoppr is an amazing mount. As soon as we arrive, all eyes are trained on us. Luckily I put on my hood while crossing the Bifrost, so no one will annoy me. I get off of Gulltoppr as Frida speaks to me.

Frida: I'll be in the spectator box, do you know where to go?

Y/N: All I have to do is show them my pass and someone will escort me to the arena. 

Frida nods and the guards escort her to the spectator box. Chuckling, I walk to the registration table where a woman is filing her nails. She looks disinterested in the applicants overall and sounds almost robotic when I walk up.

Woman: Tickets are $20.00 for normal, $40.00 V.I.P., but the price is cut in half for anyone with a membership.

Y/N: I'm a fighter.

She finally looks up at me and her eyes gain a look I know all too well. Fear. More specifically, the fear they feel from looking at me. My size, my seemingly glowing eyes, and my cloak obscuring my features make me look like I'm a murderer. My voice doesn't help in the slightest as I sound incredibly aggressive. I place my card on the desk and the woman shakily takes it. After scanning it and clipping a hole in it, she escorts me to a door. She moves aside and opens it with a key card.

Woman: T-this door will lead you to the a-arena, s-sir.

I nod and walk through the door. I somewhat stand out within the arena, but not as much as I thought I would. The fighters are incredibly diverse, but all of them are men. There's Demons, Devils, Orcs, Humans, Faunus, and even a couple of Goblins with various different weapons. I lock eyes with my target and slightly growl. My target is Max, Union's prized teacher and lapdog.

Max pov
This is it. Ozpin gave me a mission to retrieve an ancient artifact in the shape of a short hammer. The hammer allows the wielder to control lightning and comes back like my weapon, the Axe of Frost.

I'm sad I had to kill someone to retrieve it, but he was slaughtering a group of White Fang soldiers. Yeah, they're villains, but even villains deserve a second chance. I just hope I don't have to kill anyone else, that guy's death still haunts my dreams. His last words were no better.

Warrior: Enjoy your last moments, worm. May the thunder and lightning strike you down and gut you like a fucking pig!

Still don't know what that means. Not even the Headmasters can figure it out.

3rd pov
As every fighter in the arena grows restless, the speakers blare to life.

Announcer: As you all know, this is a free-for-all match with a new rule.

Many fighters look confused. New rule? All they know is you fight until there's only one left.

Announcer: Free-for-all matches are always given either a surprise rule or surprise penalty. This surprise rule is....... TO THE DEATH!!!! Fighters, you are allowed to kill each other! Ready, fight!

With the knowledge they were given, every fighter slaughters each other without a shred of mercy. Not only does Max's eyes widen, but the people who attend Union also look surprised, shocked, and horrified. This is the first time the Chaos Arena has had a large-scale to-the-death free-for-all, publicly at least. Max is no different from his Union peers. The mere thought of killing another person sickened him to the very core. For him to kill to complete his mission horrifies him. 

Max: W-what?

Y/N on the other hand scoffs. The Nords, no matter the gender or profession, are a warrior race. Within the Kingdom of Invar, there are two races of Nords: the Aesir and the Vanir. The Aesir are battle-loving Nords with incredible strength and utilize Rune Magic in battle. Aesir Nords have blonde hair and blue eyes, or black hair and orange eyes if they're dark-skinned Aesir. The Vanir have incredible connections to Seiðr, or their form of magic, and nature. Vanir Nords have brown hair and green eyes or, black hair and brown eyes if they're dark-skinned Vanir. By nature, fighting is in his blood, and he'd be lying if he said he wasn't excited about this bloody free-for-all. Under his hood, he gives a sadistic smile before springing into action. He surprises all of the fighters by turning into a large white wolf and attacking without a shred of mercy. The blood of his opponents stains his once pristine white fur with splotches of crimson, but he doesn't care. All he wants to do is kill, kill, kill till there's no one left.

Within the spectator box, several important people can be seen. These people are the Union Headmasters consisting of Minister Honest, Sirzechs Lucifer, Ozpin, and Nezu. Vampire lord Edwin Black is also within the box as he is a very influential man who can't be touched by normal means as well as Queen Frida. Minister Honest tries to talk to her constantly to get her to make an alliance with the Empire, but she never gives the time of day. There are also various influential men and 6 Demon politicians.

Demon 1: This match will be very profitable for all of us.

Demon 6: Anyone placing bets?

All 6 demons place bets on all of their fighters. Frida secretly smirks and walks up to the Demons with a sway in her hips. One of them notices her walkover and gains a perverted look.

Frida: May I place a bet?

The Demons nod so hard you would think their heads are going to fall off. 

Frida gives a seductive giggle before reaching into her breasts. While the men look at her with bloody noses, Frida pulls out an expensive-looking bracelet. The bracelet is made of gold with Nord designs and three gems on the eyes of the animals put onto it. On the wolf is an orange gem, on the raven is a dark blue gem, and on the bear is a light blue gem.

Frida: This bracelet is called þrírarmr, which roughly translates to "three arms" in Nordic. This bracelet was crafted with spare parts from the famed three artifact weapons created by the Nords. Those who wield it can tap into a portion of their power and turn into an ice bear, fire wolf, or storm raven. I'm betting on my fighter, the one with the cloak, er, in wolf form rather.

With this information, Ozpin gets an idea.

Ozpin: I'd like to make a bet with you, Queen Frida.

Frida: Oh?

Ozpin: We have a fighter in the arena as well-

Frida: I'm fully aware. That's why my fighter wanted to attend.

Ozpin: Well, my bet is that if we win, we get the Hammer of Storms. If you win, you get the Axe of Frost.

Frida: Firstly, don't give our weapons nicknames because you can't pronounce or translate our language. Secondly, I accept.

Both of them shake on it. Frida looks out of the window and summons both of her pet Ravens.

Frida: Can you get his cloak? I'd rather he not dirty it.

The Ravens nod and fly off. Within the arena, carnage is the only word capable of describing it. Y/N had decided to trade agility for strength by shifting into his bear form and viciously tearing enemies apart. Max on the other hand is trying to knock his opponents out, only for them to get killed by someone else not long after. Suddenly, however, dark blue bolts of lightning strike over half of the arena, killing a multitude of opponents. While Max and Union watchers look in horror, the crowd goes wild for it. Max looks for the culprit, only to see Y/N standing there with his hood up and electricity crackling around him. Max grits his teeth at Y/N and points his axe at him.

Max: You didn't have to kill any of these people!

Y/N: The purpose of this tournament is to kill until there's one left. Besides, my real target is you.

Max: Me?

Y/N: You have something that doesn't belong to you and my Queen wants me to retrieve it. So we can do this the easy way, or the hard way. You could give me the axe and forfeit the fight, or I can take it from you.

Max grips the axe harder and looks at Y/N with a determined look. This makes Y/N roll his eyes as he knows Max is going to say something about justice or a similar subject.

Max: This axe has a bloody past, no matter how their culture sees it, but now it's a tool of justice. I won't let you kill with it anymore!

Y/N simply grunts as Frida's Ravens fly around him. Y/N unhooks his clasps and rips his cloak off without damaging it. Before it hits the ground, the Ravens grab it and fly away. Every Union viewer is shocked as Y/N L/N, the weakest boy in Union, is in the Chaos Arena. His eyes and hair were a dead giveaway as it's incredibly unique. The once-scared eyes of a weakling look at Max with the stare of a warrior. Max looks in shock and horror as his former student has become something he fears the most; a remorseless killer. 

Max: Y-Y/N-

Y/N: Frankly, I'm glad you chose the hard way. I get to gut you like a fucking pig for what you did to my Battle-brother.

Max's eyes go wide once more. He finally realized what that warrior's dying words meant. Y/N takes out his artifact weapon. You see, the artifact weapons that are held in high regard by the Nords were made thousands of years ago at the roots of Yggdrasil from the blood and scales of three legendary beasts: Pyros the Hellish, Cryon the Frigid, and Elekton the Volt. The weapon Y/N wields is Mjölnir, the Mallet of Storms as Union calls it.

Max's eyes widened in shock. Union has been looking for the other two artifact weapons for almost 2 decades now. Finding the Axe of Frost was a big break for them and they thought they could find the others in a similar method. Now the student they kicked out not only kills without a second thought, but he has one of the artifact weapons they saw wreak havoc all those years ago.

Max: You have the Hammer of Storms?!

Y/N: It's a mallet dumbass. And it has an actual name, Mjölnir.

Before Max can retort, Y/N throws Mjölnir at him, sending him flying into the air with the hammer on his chest. Y/N jumps and grabs the hammer while both men are flying through the air. Y/N grabs the back of Max's head and makes the axe-wielding male look at him.

Y/N: We got a thing called blood payments where I come from. That means I get a piece of you based on what you took from me.

Max punches Y/N several times. As he's punching the Nord male, he fails to notice that the ground is fast approaching. When they finally land, Max is sent flying a good distance away.

Y/N: Now show me why Union made you their lapdog!

Max throws his axe, only for Y/N to swing his hammer at it. This sends the axe flying out of the arena. Before Max can call the axe, Y/N violently backhands him away. Y/N's body crackles with electricity before he charges at Max. Y/N body slams Max and laughs at him.

Y/N: Can't fight without "your" axe? Where's all that spunk you had earlier?!

This however allows Max to punch Y/N a few times with ice-coated fists. Y/N however catches Max's final punch, but Max pins him to a wall of ice. Even without the axe, the wielder can still manipulate ice, but they must train with it. 

Max: We don't have to do this!

Y/N: Yes we do!

Y/N pushes Max off of him, but the latter manages to get back to his feet. Max calls his axe back and swings, but he hits Y/N in the torso much to his horror. Y/N grabs Max and throws him before calling Mjölnir back. He and Max clash a few times before Y/N swings upwards, sending Max into the air by hitting his chin. Y/N jumps to Max, who lands on a pillar on the edge of the arena. Y/N punches Max cleanly in the face.

Y/N: That's for thinking you're worthy to wield a Nord artifact!

Y/N swings Mjölnir at Max, but he dodges and Y/N breaks the pillar. Max swings his axe, forcing Y/N to block it with his shield. This however sends him flying back into the arena. Both men were sent flying as Y/N grabbed the axe and used Max to break his fall by slamming his head into the arena.

Y/N: That's for disrespecting the ones that made it by not using what it's made for, killing!

Y/N looks at the Union representatives in the spectator box and throws insults at them.

Y/N: Is this your champion, a pathetic man too scared to kill?! This why heroism is pointless: those you deem "Upholders of Justice" are as weak as the ideals they idolize.

Something snaps in Max and he throws a large piece of debris at Y/N before charging at him. Max punches him once before Y/N grabs his arm and slams him to the ground.

Max: I don't know what made you go down this path, but I will help you see the light Y/N!

Y/N growls and uppercuts Max. This disorients him long enough for Y/N to grab him by the leg and slam him to the ground, causing Max to spit up blood.

Y/N: How the hell did you kill him?! Was it dumb fucking luck?!

Y/N slams Max one more time and flings him before throwing Mjölnir in his direction. Max manages to push Mjölnir, but he struggles to push it all the way away. He manages to do so but gets hit in the back of the head by Y/N calling Mjölnir to him as Max had pushed it behind him. Y/N goes to hit Max with Mjolnir, but Max starts to push back. Due to the Nord's height and superior strength, he overpowers Max and hits him in the head with all of his strength, killing him instantly.

Announcer: Looks like we-

Y/N: Oh no, I say when you're done!

Y/N summons a bolt of lightning and brings Max back to life. He then grabs the disoriented male and flings him a good distance away. Max throws the axe at Y/N, who throws Mjölnir at the same time. The clash results in a large bolt of frozen lightning that flings their weapons back at them. Max tries to reason with Y/N, but Y/N ignores him and rushes towards him. Max hits Y/N with the blunt end of the axe, which knocks out one of his teeth. Y/N chuckles at the hit.

Y/N: Now it's getting serious.

Max: What do you mean?

Y/N: You're too weak to handle a fully powered Nord, so I'll give you one last chance. Give back the Leviathan Axe, or I will kill you.

Max looks at the now-named Leviathan axe before looking at Y/N with a look of determination.

Max: No. This axe can be used for justice, that's why it was given to me. 

Max remembers all of the struggles he went through. Losing his allies, the grueling training, seeing the corpses of the innocent, hearing their screams, all of it is what drives him to be a Hero. Max looks at Y/N with a look of pure determination and points the Leviathan Axe at the former Union student.

Max: The Headmasters entrusted me to help others with it, I won't let you take any more lives with it! I promise you Y/N, I WILL help you get back to the path of being a Hero!

Max's determination makes any and all Union supporters cheer for him. Y/N chuckles at the sentiment before it turns into full-blown laughter. This makes them glare at Y/N, but he doesn't care in the slightest. In fact, he finds their anger amusing.

Y/N: You think a stupid speech is going to make me go back to Union?! HA, I'm much happier slaughtering anyone who opposes my queen than serving children in a seat of power. I will NEVER go back to Union, and a little BITCH like you isn't going to change that!

Max: I stand by my promise, I will save you, even if I have to beat you into submission.

Y/N: You asked for it!

Dark blue tattoos manifest on Y/N's body as his eyes glow the same color.

Y/N: Once I kill you, I'm gonna make sure you become food for the damn hogs!

Y/N charges at Max with speeds he can't react to and hits him with Mjölnir, sending him flying into the air. Y/N flies, courtesy of Mjölnir, and throws the hammer into Max's back. This causes the male to yell in pain before being sent to the ground. Y/N lands in front of Max and notices Mjölnir still on the male's back.

Y/N: You constantly try to be a damn Hero that rides the dick of justice, but I'll show you where that gets you!

Max: I-i can't feel my legs.

Y/N: Being crippled is the least of your worries.

The Leviathan axe lands a short distance away from Max, who crawls to said weapon. The moment he touched the shaft, a boot steps on his hand, crushing it. As he yells in pain, he looks up and sees the glare of Y/N.

Max: W-why?

Y/N grabs the Leviathan axe, which freezes itself and his arm. He grunts a bit before the ice breaks, revealing the Leviathan axe's new form.

Y/N: So you accept me as your master?

Seeing what his student is about to do, Max tries to reason with Y/N....

Max: Y-you don't have to do this. Let me help you become the Hero you've always wanted to be, I-i'm sure the Headmasters will let you repent for what you've done.

.....but Y/N wasn't trying to hear any of it.

Y/N: No, I want to do it. I almost feel bad since your bosses basically sent you to be a delivery boy and provide me with some entertainment.

Y/N picks up Max by the arms and kills him in one of his more brutal methods.

https://youtu.be/_rOGgojKDrw

After killing Max, Y/N cuts him in half with his new weapon.

Y/N: The fight was fun, I'll give you that.

Announcer: And the winner is, Y/N Agnar!!!

The crowd goes wild as Frida's Ravens deliver Y/N his cloak. He puts it on and walks away, leaving a distraught Union and greedy high-ranking officials. 

Timeskip
Y/N, Frida, and her guards are walking back to their respective vehicles. Before they can, however, they hear an annoying voice.

???: Hold it!

They turn around to see Minister Honest, Sirzechs Lucifer, Archangel Micahel, Ozpin, Nezu, Ironwood, and several Atlas soldiers. Gulltoppr growls and gets ready to attack, but Y/N pets his beast to calm it down.

Y/N: Calm boy, they're not enemies, yet.

Ozpin: Y/N L-

Y/N: Agnar.......

Ozpin: Well Y/N Agnar, you are under arrest for murder.

Y/N: Who did I murder?

Nezu: Max Adams! He was a Hero-

Y/N: Let me stop you there. In your eyes and government, he was a hero. But to us Nords, he's a no-good thief. Did you know that the Nords have a law that desecrating or disrespecting anything ancient is punishable by death via gladiatorial combat?

Frida: He is correct. You all stole a very important piece of Nordic history and gave it to someone who disrespected it to the highest degree possible. Mjölnir and the Leviathan axe are not tools of justice, they're meant for combat for the strong and worthy to wield them. That Hero you gave it to deserves to be tortured before he was killed, how would you Devils feel if we took an artifact that held historical significance to you and did whatever we wanted with it, hm? Or what if I took Excalibur and used it as a simple cutting knife?

Ironwood sends Winter Schnee to attack them, but Y/N is quick to act. He throws one of his hatchets at her but yells a word before it lands.

Y/N: þruma! (proo-ma)

Winter gets shocked by the hatchet, making their eyes go wide. Frida goes into her carriage, Y/N gets on Gulltoppr, and the guards get on their horses.

Y/N: If you ever want to "talk diplomacy", here.

Y/N throws a crystal ball at them before they all leave. Ozpin picks up the crystal and looks at his allies.

Sirzechs: So what now?

Ozpin: Now?

Ozpin looks at the crystal ball.

Ozpin: Now we do what they say and use diplomacy.