Author's Note: Hello! This is my first attempt for a fan-fiction and I was pretty hesitant in doing so, however I'm not a stranger into writing and creating.

This story is inspired by the Kingdom Hearts universe,what is used from it are : the Keyblade,the Heartless,the Nobodies, and the Door to Light. No other characters or worlds will be included.

The story takes place when we defeat Gul'dan at Nighthold, and the whole series will continue in Azeroth and Argus, at least for the time being. Hope you'll enjoy it!

13/4/2017 update: FFN had some words/paragraphs scrambled on the next chapters, they are now fixed.

Prologue- The Nighthold

"This is our world! Not the Legion's!" A voice shouted. Screams filled the air, an intoxicating smell of fel magic and burned corpses engulfed the heroes that were desperately trying to bring down the Master Warlock.

A body was thrown off the tower the fighting was taking place, the Warrior Orc had crashed into the ground, his armor destroyed, his head split wide open from the fall, painting the grass red with his blood. And he wasn't the first corpse to litter the once beautiful gardens of the Nighthold.

"Gul'dan wavers! He will fall!" the same voice said again as an enormous black vortex swallowed the floor, colliding with arcane energies and the faint glow of souls. An unending fight with time itself, so that the Fallen Titan Sargeras would not possess the lifeless body of the first Demon Hunter.

An elf in indigo and silver plate armor was relentlessly fighting on the front lines, damaging the enemy and protecting as best as she could her allies with an odd shaped sword that resembled a key . Its grip was long, the guard and the pommel of the weapon had several carved crescent moons and stars, all of them indigo colored. On the pommel of the blade a chain was attached and in its end a crest of a combined heart and a crescent moon was attached .The main body of the weapon was also large , of onyx color, a single silver line embraced the shaft creating a swirling pattern around it. A head at the end of the sword resembled the teeth of a skeleton key however the edges were jagged , almost looking like the crescent moons that were carved alongside the keyblade.

A soothing voice whispered to her "It is time…" , Selina's blood stained hand reached her pouch, a small artifact beaming with warm light covered her palm. She bid the Naaru Prime Xe'ra farewell, thanking her for her sacrifice. The life that was inside the artifact was pulsing, demanding to be let out as if it was a child that longed to play under the sunshine after weeks of rain. The relic left her hand, and traveled upwards, were a green glacial prison was floating. The Archmage Khadgar tried to help returning the soul back to the body where It belonged, however something unexpected had occurred. A shadow descended from the large boulder, seething with malice and anger. It had the form of the body that was lying dormant inside the prison, the Shadow was forbidding the soul to return to its body.

"You are not prepared! Behold the flames of Azzinoth!"its distorted voice screamed. Everything happened really fast, the heroes barely had the time to deflect the incoming attacking shadowy Demon. Selina feared the worst, this would either mean part of Sargeras' soul had already entered the body of the first Demon Hunter, or Azzinoth himself decided to put a stop to their plans.

There was no time to think, everyone unleashed all the power that was left in them, inevitably more people fell from the vicious creature's attacks. A Night elf got stabbed right between the eyes by the throw of the Demon's warglaive, another one's flesh melted giving the champion a slow painful death, the result of an ugly curse. But the champions did not back down. As the shadow was being attacked, it growled angrily "Behold the shadow of what is to come, the endless darkness that shall consume your world! Gaze upon the inevitable end of all you know…all you fought for!"

~•~

Everyone's vision was consumed by cruel images of Azeroth burning into green flames, its inhabitants rotting, fading away, being eaten by the corrupting flames. More screams filled the area. It wasn't the first time Selina had such a vision, but she seemed unable to rid herself of the illusion that was being cast on them, she wouldn't be able to protect the rest of the remaining fighters. A voice reached her, it was faint but she felt a rush of energy run through her body "They will not have it. " it said. A silver light cleared her vision, she felt her Keyblade burning in her hands. "Oh I had the answer in my hands all along" she thought. Raising her now glowing weapon she shouted angrily "You will not have it!". A beam of light left her blade, hitting with full force the shadow, burning it in its radiance. The monster screamed in agony, but after a few seconds, it was no more.

~•~

A shockwave of energy blasted the crystal prison backwards, smashing into one of the statues. Gul'dan didn't notice, all he could do was reach out his hand on the collapsing portal that laid beyond him and the vision of his master's arrival in this world fading.A massive figure stood behind the Warlock, tall and masculine, his sickly purple colored skin was covered in scars and tattoos that glowed a dangerous green aura. He had a face with sharp features, long pointy ears and long black hair tied up in a pony tail. This man however was not only just an elf, but also partially a demon. Huge black horns decorated his forehead; massive bat like wings emerged from his well toned back and his feet had hooves that resembled ones of a goat. His clawed hand grabbed Gul'dan who had turned to face him with dispair, lifting him up. The Warlock looked horrified when he realized the fate that awaited him. Soon green energy would penetrate his flesh, burning him from inside out. Gul'dan left a final cry before he was reduced into a pile of bones .

Illidan Stormrage, the first Demon Hunter had returned, he crushed the skull of his former enemy and looked at the weary mortals that were staring at him. " You have seen what I have seen. You know what we face. Now, mortals, follow me...into the abyss!"

Selina heard him speak, but she wasn't really paying attention. Her ears were ringing and a sudden wave of exhaustion overwhelmed her as she fought back an incoming vertigo. She noticed the floor she was standing on, it had some beautifully carved patterns. The elegant elven designs were ruined almost everywhere, the floor was burned , crackled and stained with blood…why was she thinking about the floor? She mentally slapped herself trying to get back to reality. Next to her the corpse of a gnome mage was still smoking from the magic that had killed it. She kneeled down and closed the deceased gnome's eyes, saying a small prayer to Elune.

She wouldn't dare look around her to see how many of them were lost, she would let herself grieve later for the losses, once she had gotten some rest. "Well done child." She turned facing her master, the Tauren named Adatin Lighthammer was equally worn out, his left horn was fractured, his golden plate armor was almost destroyed and had a lot of dried blood on it, but it seemed his wounds had closed either by his holy spells or by the healers of their party. On his left hand he was holding the Ashbringer, a memento from the fallen Paladin Tirion Fordring and proof of his skills as a Paladin. She smiled, really happy that her teacher had survived the fight, not like she had expected her master to perish.

~•~

Soon Thalyssra made her appearance with the rest of the elven people that had joined her rebellion. Thalyssra took her time thanking each one of the champions that remained, for killing all those who had tainted Suramar for eons and put the world into grave danger. A warm hand touched Selina's shoulder, she turned around and faced the kind hearted Khadgar who had aided them in their fight. " Champion! We made it once again!" he said with a big smile. The woman bowed to him, her helmet covered her face, but she smiled back regardless "Yes, how many wins do we count now against the Legion?I lost the count." she asked chuckling. Another wave of exhaustion threatened her, blurring her vision, she gave it no thought as she was casually talking with Khadgar about the fight, he noted that something had disrupted the spell he casted when he returned Illidan's soul into his body, but they would worry about it later. Soon a sharp voice interrupted them, "Where are my Demon Hunters?" Illidan asked Khadgar annoyed, his irritation was clearly coming from the lack of his followers' appearance into the Nighthold and from the Night elves that had entered the area.

"I am sorry to tell you that both the Illidari that had joined us in our mission here have perished, but the rest are eagerly waiting your arrival Mister Illidan."

Selina replied to him calmly skipping the details of one Demon Hunter falling into the sea were they were fighting Krosus, and the other dying because he stood in places he shouldn't. Illidan snorted "…Mister…?" Khadgar interrupted them

"Kayn and Allari have appointed my friend here as your Illidari commander in the first place…"

Illidan stiffened, he was getting angry, "How would those two let a mortal lead my Illidari…" he said irritated.

"But she did, and she is the reason you are here... " Khadgar tried to defend his friend.

"You were the one who returned my soul to my body?" Illidan asked more annoyed than surprised.

"Yeah well, no big deal, Xe'ra did all the connecting and stuff." Selina replied, her expression of annoyance well hidden under her slightly damaged helmet. She and the archmage also avoided to tell him of the shadow version of him that assaulted them during their fight with Gul'dan. Khadgar understood that Illidan was mostly displeased of the fact a stranger and not one of his trainees had rescued him, so he added

"The Naaru was important indeed, but your light was what saved us at the end of the day, and also they don't call you The Slayer for no reason…"

"I'm not going to thank any of you either way…" Illidan interrupted them, "… My magic is not completely restored either." He complained.

Selina shrugged and turned her back heading to Thalyssra. "Don't worry about it, you'll be totally okay in one or two days maximum. " Khadgar explained to him "We'll get you back to your Illidari soon." He continued.

The Demon Hunter was suffering from fatigue which was normal since his body was dead for several years and his soul was wondering into the void , his warglaives were also missing, and he noticed weird alterations to both magic and appearance of some of the elves that were present, one of them whom reminded him of an elf he once knew, the arcanist Thalyssra.

Tyrande Whisperwind, his first and only love was also there, however she didn't even look at him, she was more concerned with the injured people. He felt and saw the fel energies that littered the atmosphere, proof of the Demons talking hold onto their world again. One glance on his once beloved city, Suramar was all that he needed to confirm that. The world had changed, and he needed to learn all that was going on while he was gone, his hands itching for some action, to devastate his enemies once more, and prove to all those Mortals who once were happy with his death, that they needed him more than anything, and make them pay for their mistake. But for now he had to recover from his long sleep, whether he approved of them or not, he still had allies that were willing to help in the fight against the Legion. But in the end, time was still against them, he knew they would have to take the fight into Argus in order to achieve victory and save their world.

Author's Note p.2:

If you're reading this, thank you very much for talking the time in doing so. I don't really know yet how the whole Fan Fiction net system is working, so any critiques/advice/help is always appreciated! I tried to keep this as much cannon as possible, during the mythic fight with Gul'dan Khadgar tries to put Illidan's soul back to his body, but the"Demon Within" occurs from Illidan's body. I don't really know what that is, so I tried to fit it into the story as best as I could. Both Alliance and Horde characters fought in the story's fight!

I hope you'll forgive any grammatical or spelling errors, if you are willing to Proof/beta read it PM me, it will be of some assistance!

Reviews/comments are welcome as I noted before, let me know of what you liked/disliked. On the next chapter you'll get a full description of Selina without her armor!

P.S I am not sure if this story should be in the Crossover category or not since it doesn't really have any characters from the Kingdom Hearts universe. I will probably move it later in the future in case it is asked or if my readers believe it is needed.