Overlord of Nothingness

A/N: I wanted to thank Red X the Thief for giving me this challenge for writing this second Kingdom Hearts/ Overlord crossover.

Prologue

(Roxa's POV)

I am nothing, an empty shell of was once a hero that prevented the worlds being consumed by darkness. The memories of the hero are gone to sleep as well as his soul and heart. I am just nothing but an empty shell and a member of a group who are also nothing but empty shells. The group calls themselves the "Organization XIII", they reason of that is because there are only 13 members of that group.

I am a member of that group

The youngest

The thirteenth member

But there was a fourteenth member, her name was Xion. But she is not like us, she wasn't nothing. She was something; she was someone, someone I cherished. Ever since she joined, she became my partner, my friend second to Axel, who I see as a big brother. Xion and I only became partners for nearly a year, out friendship turned to the other level, I fell in love with her and she fell in love with me. Love, it was a beautiful emotion, it fills my empty shell of a body, it feels wonderful, warm and…other things I haven't felt during my void existence.

At the Organization, she didn't fit well with the others unlike me and Axel. She was shunned at, calling her "it" and "thing", it angers me but I assumed that she will be accepted eventually.

That I thought at first…until that incident happened.

The World That Never Was

It all start when I was forced to kill Xion, she told me that Xemnas was using her to absorb me so that my Original named Sora would never wake up to stop him in his plans. She was used, I was used and now this happened, I had to slay her with my own blades. To watch her fade away whilst holding her in my arms pains me to watch her leave me. It fills me with guilt, sorrow, but when I remembered Xion's last words, the words of warning about Xemnas, I was filled with rage.

He killed her, not I. he made us fight one another so that his plans would bear fruit. He is responsible and he will pay for his, I will avenge Xion if it means I had to betray the Organization…and my friend Axel. I know you weren't involved in this Axel because you are my best friends, but I want to avenge Xion and I hope you forgive me.

So I left Twilight Town and heads for the World That Never Was, a realm inhabited by Heartless and Nobodies, including myself. The world holds a dark city, sky eternally dark with only a heart-shaped moon for the only light source. Hovering above the city is a white floating castle, the Castle that Never Was, the main base of Organization XIII.

I travelled through the Dark City to the floating castle to I can avenge Xion. I reached the building called Memory's Skyscraper, I am close to the Castle until I was stopped by a legion of NeoShadows surrounding me. I summon my 2 keyblades: Oblivion and Oathkeeper and prepares to battle those Heartless that stood in my way. Then I sensed someone watching me, on top of Memory's Skyscraper. A person in a black hooded coat, just like mine, but I do not know him as he is not from the Organization. His face is revealed to show his shoulder length silver hair, young face but his eyes are concealed by a black blindfold.

Knowing that he too will get in my way, I run to Memory's Skyscraper and run up the walls and windows of the building. I threw Oblivion at the blindfolded stranger and he caught it and dive down and passed me. I reached the top of the skyscraper and the stranger lands on his feet to the ground and surrounded by the Neoshadows.

I watch the stranger battle the Neoshadows with the Oblivion, I jump off the building and dove down to the ground with the Oathkeeper ready for battle. I landed with a crouch and started slaying the Heartless while the stranger does the same. We kept battling the Neoshadows until there are none of them left and both of us with our backs turned.

We stay like this for less than a minute and then turned and jump back.

"Who are you" I asked to the stranger.

"Does it matter? Replied the stranger "I here for you"

I don't know why the stranger want me for and basically I do not care as vengeance is in my mind and I don't have time to waste. But I am curious about why the stranger is after me so I'll ask him anyway.

"Why do you seek me?" I ask

"Because I want back the rest of Sora's memories" answered the stranger.

Sora, I knew it. This stranger must be an acquaintance of my Original and he came to capture me so that he would return. It makes sense, because I am the Nobody of Sora, his empty shell.

"Sora…It's all about him" I said as the memories of my original flows in my mind. To be honest, I hated Sora and grew jealous of his existence while I had nothing. Despite having Axel and Xion as my friends, my existence is naught. And because of Sora I existed, now alone. "Sorry, you can't have them"

"What do you mean?" asked the Stranger

"Sora this and Sora that" I said, anger filling into my hollow body "It's because of Sora I was used by Xemnas to prevent him waking up, it's because of Sora I became what I am, it's because of Sora that Xion is dead by my hands"

"Xion, you care about her, don't you?" said the stranger "it's strange for a nobody to feel love"

"And why can't I feel love" I asked to the Stranger

"Because nobodies void these emotions" said the stranger "and your so called existence has got nothing to do with Sora"

"Enough of this, I don't have time to argue about by exsistance" I said "Now stand aside so I can avenge Xion"

"And how will you do that?" asked the Stranger

"By killing Xemnas and destroying Organization XIII" I said, that is the truth. The entire organization will fall, except Axel because I would not have it in me to kill my best friend.

"I can let you do that" said the Stranger as he gets ready to attack, knowing that he will try and stop me of avenging Xion and I will not let him stop me.

"If you don't stand aside, I will not hesitate to kill you" I said with a deadly tone.

"Don't do this, the Organization will destroy you" said the Stranger

"SHUT UP!" I roared as I heard enough and nothing this stranger will say will dissuade me of my vengeance. I charged at the blindfolded stranger and clashes blades with him.

We clash blades and continues to fight, this stranger is determined to stop be heading towards the castle. Trying to protect what left of Sora within me. I swung my blade at him and forced him on the ground.

"Why? Asked the Stranger will realization "why do you have a Keyblade"

I looked at my Oathkeeper and then at the stranger and continues to attack.

"Shut up" I said as I swund my keyblade vertically at the stranger.

CLANG

The stranger blocked the swung and got back on his feet, the impact of the block forced me back and crashed onto the floor. The stranger looks at me and walks towards me to see my face revealed as the hood over my head was flung back. The stranger stands there for a few seconds until he prepares to stab the Oblivion into my heart.

CLANK

But he didn't, he stabbed the ground near my face and just stood there. Why? Why hesitate when you have the opportunity, why not end me now. I know why and that answer angers me.

Sora.

I snapped my eyes open and jumped onto my feet with the Oblivion in my grasp. I swung it at the stranger but missed as he leaned back and jumped back. I charged at him while he casts a spell to stop me but I swatted it with Oblivion and continues to charge at him. I swung my key blade but he dodges it and jumps back again. This is irritating me and mocking me.

"Why?" I asked "Why don't you quit?"

He said nothing for a few seconds until he said something I never expected for him to say to me.

"Come on, Sora you're stronger than that" said the stranger in a teasing tone.

Something within me reacted and I responded but were no my words.

"Get real" I said unconsciously "look which one is winning"

I covered my mouth as those weren't my words, it was Sora's.

"I knew it" said the stranger in a serious tone with a hint of relief and happiness "you're Sora's nobody. Guess DIZ was right after all."

"What are you talking about?" I said angrily

This angers me and summoned the Oathkeeper in my hand and charges at the stranger.

"I am me" I said as he swung my blades at the stranger "NOBODY ELSE!"

I swing my blades at the stranger, fuelled with rage and hatred of my original I charge with the intent to kill his stranger. Xemnas can wait, he is first to die by my blades.

CLANG

CLANG

My swungs are brutal but the stranger is dodging the attacks, so I swing them faster to that the stranger cannot dodge them easily and worked but the stranger blocked it but the impact forced up to roll on the floor. He pants and slowly stands up, only a few feet away, he look through those blindfolds and looked desperate. What trick does he have under his sleeves, does he have a trump card to assure victory?

"Alright" said the stranger to himself while he reaches for his blindfold and takes it off to reveal his blue eyes. "I have to unleash the power in my heart, the dark powers that I'm holding back. Even…if it changes me forever"

The stranger then gets shrouded by darkness, I can see him change. He grows taller, his skin darkens into a tan, his silver hair grows longer and his blue eyes turn into a golden colour. I was shocked beyond surprise as I saw the stranger changed…he looked like Xemnas. Behind the Xemnas-like stranger is a Heartless with long crooked antennae-lik appendages on it's head, it's skeletal like mouth is partially covered with bandages, but I can see it's showing only its blue gums, glowing yellow eyes and sharp teeth. It has a heart-shaped hole located on its abdomen, symbolizing that is has no heart. Typical for a Heartless.

I noticed that this heartless is fused with this stranger that looked like Xemnas, like it's a part of him like a symbiote.

Then sudden the Symbiotic Heartless grabbed me by the neck and lifted me into the air. I cannot breathe as the Heartless is strangling me and I am starting to loss consciousness. My vision is getting blurry and dark, I am losing consciousness within a brief second, my grip on my Keyblade were getting loose and I dropped them on the ground and they faded into flickers of light and darkness. My last sights are the Xemna-like stranger with his Heartless Symbiote these are the only words he said, unknown if he was talking to me or to himself.

"I have accepted it"

Then everything went dark.

(Normal POV)

The stranger places the unconscious Roxas down and sighed at this. He has let the darkness within him change his form into what he is now.

Don't worry Sora, you'll be back. And forgive me for letting the darkness within me take over. Thought the stranger until he heard something approaching and saw glowing eyes within the shadows of the alleyways of the city. He summons his weapon, a sword that the blade is in shape of a bat's wing and poses in a defensive position.

"Who's there?" asked the strange as the eyes from the shadows turn into small imp-like creatures in dirty brown loincloths and has yellow skin. These creatures are wielding clubs, daggers and other things they took to use as a weapon. "What are you creatures?"

The imp-like creatures did not respond and only charges at the stranger. The stranger now knows that those strange creatures will not answer and are hostile to him. He has no choice but to attack them. There are about a dozen or 2 of those creatures and are surrounding the stranger, he lost his attention to Roxas and not focusing on those strange imp-like creatures that are attacking him.

Meanwhile as the stranger is focusing on the creatures, another one of those creatures but in red ragged robes, grey skin and white thick sideburns and a wispy beard on his chin appears out of the portal of darkness and starts dragging the unconscious Roxas inside.

The Stranger is busy finishing off the creatures and turns to realized he was too late, Roxas is gone and no where to be seen.

"Riku"

Another portal of darkness appears behind the stranger known as Riku and reveals to be a man in black robes, a red cloak. His head and face is covered by red bandages and 2 black straps over his right eyes, only his left eye is revealed and so too is his mouth. This eyes is an amber colour and despite his face being covered, his skin has a dark tone.

"DiZ" said Riku as he covers his head with the hood.

"What happened, where is Roxas?" asked mysterious man named DiZ

"I was distracted and he was gone" said Riku

"Gone?" said DiZ with confusion "Did you not apprehend him?"

"I did…but he's not here" said Riku

"He must be found, for Sora's sake" said DiZ

"I will find him, I swear it" said Riku

"See that you do" said DiZ as he opens a portal of darkness and enters it, leaving Riku along near Memory's Skyscraper.

"What just happened, and what were those creatures?" asked Riku to himself while he leaves the World that Never Was via though a portal of darkness.

Somewhere in a different world

Roxas is now not in the World That Never Was anymore, he is in an unknown one thanks to the strange creatures that dragged him in. Roxas is placed in an altar within a tomb. He is not dead but unconscious and time will tell when he will awaken. The old grey creature watched Roxas's unconscious form and chuckles at him.

"Now all we do is wait" said the creature as he then leaves Roxas in the tomb.

Castle that Never Was: Where Nothing Gathers

Within the Castle, in the room known as "Where Nothing Gathers" or the "Round room" to the members of Organization XIII, the members of said Organization were gathered as the leader of the group, Xemnas has some grim news.

The members of the Organization (minus Roxas and a few who fell by the hands of Sora) are all seated on their thrones, each on random lengthened columns. Xemnas sits on the highest and he clears his throat.

"Gentlemen, I have some tragic news for you all" said Xemnas "Roxas is gone"

"What?" said Axel with worry and concern for his friend "What happened?"

"When he was returning home, he was kidnapped" said Xemnas "the dusks gathered this information to me. It is tragic"

"Sir, request for a rescue mission" said Axel

"Denied" said Xemnas

"but…"

"Axel, I know you are concerned for Roxas but right now we have other duties to fulfil" said Saix "is that right, Xemnas"

"You are correct, Saix" said Xemnas "right now we have our main objective to focus on. I hope you haven't forgotten about it, Axel"

Axel growls at this and then sighs as he cannot argue to Xemnas about it.

"No sir, I haven't" said Axel

"Good, despite this tragic incident since we lost 2 of our members today. This will not affect our plans that this organization has been formed for" said Xemnas "you are all dismissed"

The members of the Organization were dismissed, leaving Xemnas alone as he looks up at the skylight where the Heart shaped moon is revealed.

"This is going to get complicated…no matter" said Xemnas "since Roxas is gone, Sora will not be awakened to foul my plans"

Unknown to Xemnas, Axel was eavesdropping and decided to disobey him and started to search for Roxas himself.

Don't worry, Roxas thought Axel I'll find you…and I'm sorry for Xion's demise.

6 days later

It has been 6 days since the disappearance of Roxas and he remains unconscious in the tomb of this unknown place. It is as he is under a sleeping spell and will not awaken. The old grey creature continues to watch the unconscious Roxas patiently for him to be awakened. He wonders what is preventing the young Nobody to remain asleep.

Once again the old creature leaves Roxas and hopefully waits for another day. Unaware that a cold malevolent aura shrouds the tomb and an evil glow appears and reveals itself as young man in his 20s, wearing dark intimidating armour and has glowing translucent form, revealing him as a lingering spirit. His gauntlet clad hand is plunged into Roxas's body and ripping out fragments of what appears to be a heart and then emerging inside Roxas.

"The time has almost come, Roxas" said the malevolent spirit as he enters the body of Roxas and entering his psyche. "Time for you to awaken, Awake for your reign as Overlord"

End