The Demonic Swordsman Of Fairy Tail

Two years after Nautale's mission

The various guild masters were furiously watching the Fairy Tail team before their eyes. The team of Erza, Natsu, Gray, and Lucy had defeated the mighty Lullaby demon, but in the heat of the moment they also destroyed the building for the Guild Masters annual meeting. Thinking of the money that would have to be spent to repair the damage, Makarov's soul was about to leave his body. On the other hand, those responsible for the problem did not care, but were actually happy to have such an intense fight.

Suddenly, an explosion of black flames occurred in the middle of the mage group. Most of the guild masters found themselves out of battle, because even if they were magi, they were used to doing administration jobs not to fight.

Luckily, the Fairy Tail team came out with only slight injury, especially Natsu who had great fire resistance.

Lucy: W-What happened?

Natsu: We are attacked!

Erza: Be on your guard!

The intensity of the flames began to diminish rapidly, but the smoke was still very present.

Everyone could see that the person responsible for this attack seemed to be appearing through the infernal flames. This individual was wearing a black coat with red clouds. It was impossible to see his face because of his white mask consisting of a wavy pattern with three tomoes around the center, two of which act as holes for the eyes of the mask.

The demon advanced to the spot where all the mages were before the explosion and picked up an object. It was the Lullaby flute.

???: Mission accomplished.

Because of the mask, the voice of the individual seemed very serious.

As he was about to leave, he narrowly avoided a fiery fist by making several jumps as he stepped back from his position which made him land on his right knee. It was Natsu with Gray and Erza.

Natsu: You will not go anywhere with this flute !!!

Gray: Did you really think you could leave so easily?

Erza: Surrender and we will show you mercy !!!

The dark wizard showed no emotion at their provocation. Normally, if the three wizards fought him together, they would certainly have a chance to defeat him, but at the moment they did not pose any threat since they had been fighting Eisenwald all day long, in addition to the Lullaby demon, so their reserve Magic was very weak

The demon stood up which made expose his bloody eyes in front of everyone. When the Natsu team saw the eyes of their opponent, they felt a strong pressure but also a kind of nostalgia, because they had not seen these special eyes for years.

Natsu: It's me or his eyes look like those ...

Before he could finish his sentence, his opponent held out his arm towards them, which made three Oriental dragons made of water appear around him. He quickly closed his fist which gave the signal to the dragons to attack. Each Dragon attacked a different target.

The first dragon swallowed Natsu, using his body as a prison. The dragon slayer tried to escape but his lack of magic combined with the opposing elemental nature of the water dragon prevented him from destroying it.

Erza struggled against the dragon but without her Sea Empress armor she could only create a draw.

By cons, the third dragon was quickly transformed into an ice sculpture before breaking into a thousand pieces. Seeing an opportunity to attack his opponent, Gray gathered his ice magic

Gray: Ice-Make: Lance

A dozen ice spears headed for the dark wizard. But before the ice wizard could see it, all the spears were suddenly destroyed. He was puzzled at first, but after a few seconds he noticed that his opponent suddenly had a katana in his right hand. Before he could send another attack, the swordsman pointed his left index finger in his direction and a small ball of black flame formed there before projecting towards his target.

Gray formed a wall to protect himself, since several other projectiles followed the first. Unfortunately for him, the dark wizard expected his gesture and used his previous attack as a diversion. The swordsman quickly skirted the ice wall and appeared at the back of the black haired mage which allowed him to strike a blow powerful enough to knock out the ice mage.

Seeing that all his opponents were out of action or too distracted to pay attention to him, the dark wizard turned to leave. To his surprise, a little man was on his escape route.

Makarov did not intervene earlier because he wanted to see if his children could take care of this person, seeing that it was not the case he decided to show himself, but he wanted to know something about the man in front of him because of his eyes.

Makarov: Before we start fighting, I'd like to know if you have a relationship with a young man named Astaroth vi Lucifer.

Now it was up to the old man to be surprised because the masked man laughed at his question.

???: Hahaha, are you asking me if I know this kid? If I can give you advice, get away from this cursed kid, he only brings misfortune to those around him and you'll end up regretting having met him.

Before he could ask him to explain his advice, Makarov saw that the tomoes in the black magician's glowing eyes changed shape to become a complete circle with three small rings on the black line. Before he could react, his field of vision changed. Before his eyes was a gray field with hundreds of different swords planted in the ground. He tried to move, but his hands were chained above his head, causing his body to hang in the air. The man who had put him in this state appeared before him like a ghost.

???: Welcome to my hypnotic world, Tsukuyomi, in this world time goes by differently. 72 hours equals three seconds in the real world. And if we started this little session.

To the great fear of the old man, his torturer pull out a feather from his sleeve. It was going to be 72 infernal hours.

(Sounds funny like that, but honestly it's a real torture practice, no need to shed blood to torture someone.)

After his horrible experience in the illusory world, Makarov fell to the ground, exhausted mentally. The masked man could leave with the flute without anyone being able to stop him.

...

Throne Room of Grimoire Heart

The masked man was kneeling before Hades. He no longer wore his mask, which made it possible to see that this man was Astaroth. Hades seemed pleased as he watched the flute in his hands.

Hades: Well played, with this flute we only need a few keys to release Zeref.

Astaroth: I only contributed to the goal of our guild.

Hades smiled at the response of his subordinate, in a short time his dream of The Ultimate Magic World, would soon be realized. He was really surprised that Astaroth could steal this demonic flute while Makarov was there. What he did not know was that the swordsman had managed to place the Fairy Tail master in an illusion only because he had prepared no defense against that kind of attack, otherwise, the old man would not have been easily defeated.

Hades: I have another mission for you. Knowing this kid from Makarov, he will inevitably oppose our goal. In order to collect more information about the different mages of this guild, you will have to stay undercover for a long period of time, probably for several months.

Astaroth: As you will want master.

The swordsman seemed calm at the mission his guildmaster had given him, but inwardly he thought that his final choice between light and darkness would come soon.