[Copied from https://pastebin.com/Dc9WvytQ]

>Day Ponies Are Supposed To Be Small.
>Usually you prefer waiting until the battle is over before entering.
>Why would you sully your hooves with fighting?
>These humans, as they are called, are calculating and deceitful.
>Once one of them nearly shot you with a bolt.
>How embarrassing would that have been?
>To allow a simple crossbowman to hurt you.
>Luckily, you had been paying attention and had noticed him moving.
>Waiting for his moment.
>His one moment of glory before death.
>But, sadly for him, it wasn’t enough.
>You stopped his bolt only inches from your flank.
>Not a critical blow, but it would have made you look weak.
>It took days for him to die.
>You allowed one of his compatriots to watch.
>To hear his friend screaming.
>Then, you let him escape.
>What would be the point unless the others learned of your cruelty?
>After a few more battles, most humans gave up when you arrived at their cities.
>Ponies are, of course, bigger than these creatures.
>Not by height, but by size.
>You look at one of them laying on the stone stairs.
>Most ponies would be chest height to the nameless man.
>He would obviously have to look up to you.
>This makes you smile, as you continue climbing the steps.
>Shadowbolts flank you on either side.
>Usually you hardly notice them, but they are nervous and stay close.
>”My Queen, it isn’t safe yet.”
>You look at the cowering worm who dared speak to you.
>Soaring or something.
>You don’t quite remember.
>All that you seem to remember is that he used to be a wonderbolt.
>Since you are in a good mood, you decide not to kill him where he stands.
>Instead, you offer him only a curt reply.
“I shall decide what is safe, and what is not.”
>He bows quickly.
>”Yes, my Queen.”
>Ignoring him, you continue.
>Around you, you hear screams and the sound of battle.
>The humans are putting up more of a fight than usual.
>This was expected.
>You understand their king lives here.
>Anonymous.
1/6
>Whether that is his true name, or the humans dare not speak it, you aren’t sure.
>All you know is that it took three days to breach his walls.
>Their mares and fillies will make good slaves, but the stallions are too dangerous.
>They must all be killed.
>You finally climb all the stairs and see a garden.
>Ponies and humans lay in a pile in the center.
>You crinkle your nose.
>The smell of death is fresh and raw here.
>The fountain is a nice touch though.
>It will have to include a statue of yourself, but that can be taken care of later.
>At the far side of the garden is a large open door.
>No.
>It was a set of doors.
>They were battered open and large chunks of splintered wood decorate the stone floor.
>Behind it, you can hear shouting.
>The sound of a weapon hitting armor.
>A scream.
>Then silence.
>Your ponies must have killed the last defender.
>Though you know your guards will disapprove, you enter.
>A throne!
>Again you smile.
>It is, of course, just a simple symbol.
>But sitting on it would essentially allow you to declare yourself Queen of All Humans.
>The shadowbolts glide in silently beside you.
>”You there! Stay where you are!”
>The shadow bolts brandish their spears.
>You furrow your brow.
>Why are they ruining your moment of victory?
>Then you see it.
>A lone human.
>He is on his knees.
>The man wears plate armor, though blood is seeping through the joints.
>A sword of some kind is beside him, on the floor.
>His hand touches the hilt, though from his heavy breathing, you doubt he can lift it.
>In front of him are four ponies.
>All were hacked to death in one way or another.
>Worthless.
>The human notices you.
>You watch as his eyes move from glassy, to recognition.
>He coughs out blood, before speaking.
>”You’re big for a pony.”
>This makes you laugh.
>Of all the stupid things to say, he chooses that.
>Two shadowbolts approach slowly with their spears.
2/6
>No doubt they are cautious after seeing their fallen comrades.
>”Be silent, human!”
>He shakily moves his right leg so his foot is on the ground.
>Then the other foot.
>Finally he rises.
>He wobbles as he stands, and it takes a moment for him to steady himself.
>The human raises his sword, and rests the guard on his shoulder.
>It’s nearly as long as he is tall.
>A Greatsword.
>Your shadowbolts hesitate.
>Worthless.
“Give up human. You’ve lost.”
>”Never.”
>You take a step forward.
“And why would you continue to fight us? The battle is lost.”
>He wobbles, and he has to change his stance to keep his balance.
>”Not while I still stand.”
>Normally you would kill him for daring to respond to you.
>But, again, you are in a good mood.
>You humor the dead man.
“And why do you think you are so important?”
>He takes several deep breaths as he looks at your soldiers.
>Likely he is deciding if he has a chance.
>With you here, he has none.
>”I am King Anonymous. And as long as I stand, we will continue fighting.”
>You raise your eyebrows.
>This is their king?
>A man who can barely kill four ponies?
>You smirk.
“And I am Nightmare Moon.”
>You watch as he realizes his predicament.
>A shadowbolt or two, he could kill, no doubt.
>But a Queen?
>The Queen?
>He tries to stand taller.
>”Good. Then we can end this here and now.”
>You nod benevolently at him.
“We can.”
>You take another step forward, and he readies his sword.
>The shadowbolts try to get between you, but you wave them off.
>Annoying ponies.
>You shall deal with them later.
>It’s been a while since you’ve fought.
>No doubt the exercise will do you well.
>”Well? Get on with it?”
“Eager, aren’t you?”
>Anonymous bares his bloody teeth.
>”I am.”
>He still has fight in him.
>Good.
>Against your better judgement you decide to give him a chance.
3/6
“I shall make you a proposition. Lay down your sword, and swear allegiance to me, and I will allow you to live.”
>”As a slave?”
>You press your lips together.
“As an exile.”
>”And my people?”
>You offer a noncommittal shrug.
>He shakes his head.
>”I can’t do that.”
“Then we have nothing else to discuss.”
>”Good.”
>He lunges at you and swings his Greatsword. 
>You dodge his clumsy attack, and throw-
>No, your magic has no effect.
>Again he swings and you launch yourself into the air.
>He allows the momentum to carry him, and nearly gets to grab a hoof.
>But you were too fast and buck him to the ground.
>His armor clatters loudly as he falls.
>Again you leap to crush his skull, but he rolls away.
>You can see cracks in the marble floor.
>He climbs to his feet as quickly as he can, and lifts the sword above his head.
>You circle each other, waiting for an opportunity.
>You magic a spear from one of your shadowbolts.
>He instantly lets go and allows you to take it.
“How is your armor magic resistant?”
>This makes him smile, but he doesn’t answer.
>It doesn’t matter.
>He will be dead soon enough.
>You lunge at him, point first.
>He dodges the thrust and swings his sword.
>This time you aren’t quite fast enough, and stumble.
>The point makes a deep scratch in your armor.
>He follows with another blow, but you manage to block it with your spear.
>The wood cracks loudly, but doesn’t break.
>Still, you don't want to use a potentially compromised weapon.
>He doesn’t have time to continue before you dash backward.
“Another!” You command, and a shadow bolts hoofs his spear.
>Again you begin your circling dance.
>You weigh his movements.
>He favors his left side.
>Obviously trying to protect it.
>That’s his weakness.
>You feint to his right, and his moves his sword to block.
>The spear easily finds the gap in his armor, and he shouts in pain.
>Somehow he manages to stay standing.
>He swings his sword, but he’s slow now.
4/6
>You easily avoid the blow and attack his legs.
>He tries to move away, but your spear finds purchase.
>Anonymous falls to his knees.
>He desperately clings to his sword.
>But you know he won’t last long now.
“Submit, and I will spare you.”
>”As a slave?” he repeats.
>You lunge at him and he falls on his back.
>You put the spear point at his throat.
>He watches you closely.
>Anonymous has one hand on his sword.
>It won’t be enough to move that hunk of metal.
“No. Being a slave would be too good for you. You will be tortured. You will beg for death. And, when I am sufficiently pleased, I may allow you to die.”
>”Then I can’t accept.”
>This makes you laugh.
>It’s a deep laugh.
>It’s absurd that a human would continue to fight when he has clearly lost.
>He offers you two weak laughs.
>Perhaps he thinks his defiance might win him some dignity.
>You hear the sound of a blade leaving its sheath.
>He grasps your spear with one hand, and the other has a knife at your throat.
>”It would appear, the tables have turned.”
>You bare your teeth at the insolent human.
“It appears so.”
>”Let my people go, and I will spare your life.”
>An eternity passes.
>You can’t accept his offer.
>If anypony knew you bargained with a human, then they would say you are weak.
>Still, this is the first thing to ever question you openly.
>It would be a shame to kill him now.
>He presses the blade closer, and you swallow.
>”Well?!”
>Beside you a shadowbolt shuffles.
>Before he can react, the pony grabs the knife.
>Anonymous tries to struggle, but he is too weak.
>The knife clanks loudly on the floor.
>Perhaps these ponies aren’t as useless as you thought.
“Anonymous. The time for humans has come to an end.”
>He lifts his chin, exposing his neck.
>”Get it over with.”
>You move your head to the side.
>Even facing death, this human is defiant.
>You watch him closely.
>No one has ever disrespected you this often.
>Perhaps he truly is worthy of being a king.
5/6
>You bite your lip.
>”If you swear allegiance, I will spare you.”
>He closes his eyes.
>”And my people?”
>You take a deep breath.
>It would be a shame to kill him.
>To kill somepony who would dare stand up to you.
“All humans?”
>He doesn’t answer.
“All humans!?” You shout.
>He coughs up blood.
>”Just mine.”
>You let out a loud huff.
>It is better to make him wait.
>To make him know that everything depends on your whim.
>That you are the only chance they have.
>The power you command is impressive.
>Many have sworn allegiance without ever getting a concession.
>But, you can be kind as well.
>Silently you curse yourself.
>Why is this man different?
>You should kill him now, and be done with it.
>Still, it would be good if you let him go.
>Then other humans might think they have a chance.
>Others will bow willingly, if you concede just this one point.
>Against your better judgement, you again decide to take a chance.
“They will be spared.”
>”All of them?”
“Only your people. Not all humans.”
>He opens an eye cautiously.
>The other soon follows.
>”I suppose, that’s the best I can hope for.”
>You press the spear closer, and he tries to move away.
“That’s right. And my patience is nearly over.”
>He looks away in shame.
>”Fine. If that’s what it takes.”
>You smile.
“Swear allegiance.”
>He coughs again.
>”I swear loyalty, my Queen.”
>
>
“And that’s how I met your father.”
fin
6/6

There was an argument on the size of ponies in the slave pony thread. Personally I think that if ponies were big, they would easily enslave humans.