The Dark Salamander

A/N: Igneel may have sealed END 400 years ago but what if Natsu grew stronger over the years causing the seal to weaken unknowingly changing Natsu? A fateful battle with an unknown enemy causes the entity to awaken and cause things to change for Natsu. How will it change the dynamics of Fairy Tail and his enemies? Darker Natsu!

Disclaimer: I own nothing related to Fairy Tail except the OC's everything else related to it belongs to Hiro Mashima. Characters are OOC so you have been warned.

A pink haired, onyx eyed boy was doing a set of push ups in a wide open area surrounded by grass and trees. It has been a day since the defeat of Deliora and the people of Galuna Island were celebrating with gusto. The pink haired muscular youth was named Natsu Dragneel and the noticeable aspect of him was his white scaly scarf which was a gift given to him by his foster father Igneel.

His outfit consists of a sleeveless, gold trimmed, black waistcoat, often left open and untucked, exposing his bare chest, a gold trimmed, black cloth around his waist that reaches his knees, held by a leather brown belt with an oval-shaped silver buckle, white knee-length trousers with black ribbon ties, a thick black wristband on his left wrist and black open-toed sandals. He wanted to get some training after battling Deliora despite the fact the fact the demon nearly met its demise through a spell called iced shell.

He threw his outfit aside and continued to do his reps and sit ups while the denizens of Galuna Island celebrated "Eight hundred, Eight hundred and one. Eight hundred and two..."

Suddenly, Natsu's ears began to perk up on listening to a melodious voice. He ignored it assuming it was some random girl singing a sweet song. A few moments later, the singing got really loud making Natsu growl with irritation.

"Why is her voice so melodious? I would not mind it but she is disturbing my training. I guess I shall find out who or what it is. Something does not feel right with this voice." Said Natsu with a sigh.

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Natsu began to look for the person's voice where he reached the shore of the sea and saw multitude of rotten and mutilated corpses of around a dozen civilians.

"So, I have finally found some of the people who went missing in Galuna Island. It has nothing to do with them turning into demons during full moon." Thought Natsu with a rare show of seriousness.

A weak voice whispered "Don't listen to the voice. The song is that of a siren."

Natsu heard the voice and look towards a dishevelled looking man who was weakly lying on the ground and rushed towards him "Yoo-hoo.. Are you all right old man?"

The old man said while coughing "Barely, that creature who sings is a siren who lives underwater. Sirens are creatures who use their voice to lure sailors and any person who is unfortunate to hear it becomes a victim of her whims. So many people have killed themselves trying to search for her voice."

Natsu sighs "How can she be evil if she has such a beautiful voice?"

The old man protested "Don't be fooled by it… She is trying to lure you inside the ocean. She even comes out of the ocean to kill us and feed on humans."

"That creature is truly sick indeed… I will have to put her in her place. Yosh! I am all fired up." Yelled Natsu while his fists began to release flames.

"She is here... Run away while you can boy. I fear you are no match for her." Said the old man who coughed and wheezed.

Before the old man could say any more. A green beam of magic hit him and he began to scream while his mutilated body began to disintegrate and was reduced into a pile of bones.

"Nooooo… Whoever did that is going to pay!" shouted Natsu in anger.

"It is indeed my handiwork never truly appreciated." said a giggling voice and Natsu turned towards the sea and saw a glowing figure floating out of the water.

The glowing figure slowly reached near where Natsu stood and the light vanished. The creature was partially a fair skinned woman with a characteristics of a demonic bird. She had brown hair which reached to the middle of her back. Her body was covered with feathers and had two wings behind her back. Her beauty was more than enough to bewitch most of her victims before she disposed them off.

Natsu usually goofy and carefree nature was kept aside as he sensed the vile magic coming from her "Your days of murdering innocents are over… It is time someone puts you in your place."

"So, you are the great salamander I heard so much about… You wish to challenge me? Before you join the old man in the afterlife … Allow me to introduce myself." said the siren with a smirk.

"Shut up! FIRE DRAGONS ROAR!" roared Natsu as he let out a steam of fire from his mouth and it hurtled towards the surprised siren who was enveloped in the bout of flames.

Natsu let go of the burst of fire and laughed as he looked at the burning spot where the siren last stood "That should do the trick!"

Natsu started to walk then suddenly he felt a change in the air and saw his move being deflected by the siren.

"How rude it is to attack me when I was just about to introduce myself. Nobody messes with Zaina and lives to tell the tale." growled the siren.

Natsu growled unknowingly causing his eyes to go crimson "I do not care who you are…. Right now you are pissing me off with your presence so begone or I will burn you to ashes and scatter you to the wind!"

Zaina burst into laughter and smirked "Fool! You think your petty threats are going to make me cower. I will give you that... Your move was pretty good but let me show you how to properly do the roar!"

Natsu grins with a childish glee smacking his fists into flames while creating a red magic circle "Yosh! I am all fired up."

The siren opened her mouth and released a loud supersonic scream which caught Natsu off guard and caused the terrain to crumble Natsu was caught unawares over the scream which caused his eardrums to nearly explode. He was thrown far away owing to the force of her scream and crashed towards the nearby tree and fell down like a heap of cards.

The siren then released her wings and flew towards the fallen Natsu who slowly tried to stand up and took the support of the nearby tree. Natsu suddenly spat a glob of blood and held his sides and she stood right in front of him.

"So much for the great Salamander… I am going to finish you off." taunted the Siren and she opened her mouth.

Before Natsu could do anything she released a supersonic scream which began to make Natsu bleed even more. He held his throbbing head and closed his ears while his nose began to bleed. Unknown to the siren, an entity inside Natsu opened its crimson eyes and saw a seal began to weaken. The entity began to laugh releasing a large amount of demonic energy causing ripples in the air.

Suddenly, a huge magical explosion occurred where Natsu stood and the siren was thrown far away and fell down into a crumpled heap. Zaina coughed and looked up at a red glowing figure coming towards her.

"You had your fun…. Now it is my turn." The cold voice whispered.

Suddenly a massive force-field hit her and it began to shred her apart tearing her skin, severing her wings and making her wail in agony.

"Hurts doesn't it? When you killed so many people… did you ever know how they felt?" the cold voice snarled.

"Who are you?" Zaina shouted desperately.

"I will show you." Said the voice.

The red glow vanished and the figure turned out to be Natsu. There were certain differences in his features though. His usual onyx eyes were glowing crimson, he was taller and more muscular with a slightly darker skin and his pink hair was longer and wilder. And his attire was almost shredded due to the siren's screams so his upper torso was nearly exposed.

"You? It... Can't be…" Zaina whispered weakly but Natsu caught her by the neck nearly strangling her.

"I am done playing with you now…." He stabbed her heart with his other hand while holding her neck making her cough out lot of blood.

"Sleep!" whispered Natsu coldly and a reddish beam was released from his other hand engulfing her and burning her into a crisp.

After finishing his handwork and burning her into ashes, Natsu relaxed his shoulders and sighs and his crimson eyes turned back into onyx "I over did it a bit."

He looked around and half the trees were uprooted and cluttered the surrounding forest.

"Natsu…. Where are you?" cried a female voice and Natsu turned and saw a woman clad in an armor approaching him.

Her name was Erza Scarlet. She is a young woman with long scarlet hair which reached till her waist and her eyes were brown. Her most common attire consists of a custom-made armor by Heart Kreuz smiths, a blue skirt, black boots, and diamond shaped silver earrings. Her Fairy Tail stamp is blue and is located on the middle of her left upper arm.

"Yo Erza… I was just typing up some loose ends." said Natsu with a smirk.

Erza did not say anything looking at the destroyed forest and then looking at a hulking figure of Natsu and saw that he looked a bit different and much taller.

"Natsu… What happened to you?" asked Erza with her eyes narrowed.

"Let us say puberty has struck me early and I got myself some noticeable changes." Said Natsu with a fanged grin.

Erza would have gone into a tirade but noticed something different about Natsu and did not reprimand him on destroying anything like she always does. She decided against asking questions and thought she would ask him when they get back to the guild.

"We need to talk Natsu and I have a lot of questions for you. But for now let's go back since everyone was worried about you." said Erza with a frown and Natsu nodded.

They went back to the village where a group of villagers were celebrating Fairy Tail's victory over a demon called Deliora thus saving the lives of many.

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Meanwhile, far away from Ishgar there was another continent in the west called Alakitasia. There was a huge empire called Alvarez. It lies towards the west across a vast ocean that traveling there by boat would take about ten days to reach.

Inside the private chambers, the emperor was sitting peacefully in his sofa sipping some wine. The emperor was none other than Zeref, the most powerful black mage. Despite being over 400 years, he was a young man in his twenties. His outfit consisted of a black and white clothing of royalty. He wears high-collared red and tan robes with gold trim, along with a large, flowing white toga draped around his torso. He has short black hair, pale skin and dark eyes. He has shown himself as the man of the people as the Emperor of Alvarez and displays good will and friendliness towards his generals and subjects, which is also reflected in their opinion of him sincerely cheering and welcoming him as he returns to the capital after a long absence due to different reasons.

Suddenly, he felt a huge magical surge from far away and Zeref raised his eyebrows in surprise and thought "So, you have awoken END…. I guess it has to be you in the end who will be facing me. I guess you and Natsu are one and the same now."

Zeref remembered his brother fondly and smiled "I can't wait to see how much you have grown Natsu!"

His thoughts were interrupted when one of his servants came inside his chambers "Your Majesty, the Spriggan 12 have arrived at Alvarez and are waiting for you at the court."

"I see this is a surprise… I shall meet them at the royal court." Said Zeref thoughtfully.

The servant nods and bows and leaves the chamber and Zeref sighs "It's never easy being a king!"

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The Tartaros guild was in a large building located in what appears to be a barren wasteland. Standing among the rocky landscape, the building takes the form of a giant, slight ruined, castle. The structure itself is very big in size, containing at least three separate sections all atop one another. The two main bodies of the castle are noticeably squarer in shape and decorated with numerous crenulations, whilst the turrets and roof of the castle are more curved, their balustrade lined with decorative machicolations and their spires topped with fancy ornaments. At the gate to the castle stand two large statues.

Surrounding the Tartaros headquarters and protruding from the rock are a number of spines, these appearing quite large in size. Whether they are part of the natural landscape or were put there is unknown. This castle itself is located on a floating island, named, as well as shaped like a, Cube.

Tartaros was one of the three strongest dark guilds in Ishgar. The three guilds were called the Balam alliance which were Oracion Seis, Grimoire Heart and Tartaros.

Inside Tartaros, the leader was sitting in his throne surrounded by his servants conducting their usual tasks. Suddenly they felt a dark energy from far and the leader stood up in surprise.

"Master END is alive... Mard Geer feels so!"

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Far away in an unknown cave, a black dragon was resting after killing his victims and then suddenly detected a powerful presence of magic. The dragon growled irritably and decided to sense from where it is coming from then cocked its head up and whispered with a growl "E..N…D!"

A/N: And that's all for this chapter, It has been ages since I did any writing so sorry for mistakes so now doing it as an hobby. As for pairings it is not finalized although I am leaning on Erza. This Natsu will be different say not so kind and less merciful although there will be similarities. Let me know how you think it should have gone.