Prank and Sea King 2

Meanwhile, In Fairy Tail Guildhall

As the members of the Guild opened their eyes groggily, clearing the sleep out of their eyes, they heard a yell.

"Nnnnnnnnnooooooo" came the voice of one of the Guildmates.

"What? What happened? I am chasing Igneel to answer me, why did you disturb me" said Natsu as he rubbed the sleep out of his eyes.

"Aye, sir. I was eating this big fish all by myself without that ramen freak" said Happy much like Natsu.

"Guys, look!" Said Nab. Nab Lasaro, shortly Nab was an extremely tall, heavily muscular and massive young man, towering over most of his guildmates. His straight dark hair was styled in a bob cut, with a light-coloured band circling it near the top, and two curved bangs emerging from under it, framing the upper part of his face, which has a somewhat rectangular shape. Nab has prominent thick lips, and a pair of wide, horizontal white stripes, each covering one of his cheeks, somehow reminiscent of tribal war paint. Both of his shoulders are adorned by a white tattoo consisting of several circles, with a larger one in the centre being surrounded by smaller ones, in a shape resembling a stylized sun. 

Nab always had a tribal look to his clothing. His attire consists of a dark, open vest, with its edges decorated by green and red triangles, and a fur loincloth held up by a belt adorned by many rings. His forearms and lower legs were covered in armour plates held up by ropes, and he also carried around several small, round skulls on his person, with many of them held together by cords, circling both his neck and waist. He is a year older than Erza, Mira and Naruto. 

He seems to hang around the request board often, even though he doesn't get many jobs or missions to do. The reason why he hangs around it all the time is that he's looking for a "special job" that only he can do from Naruto's observations. And quite ironically, that is the reason why he shouted now.

"Nnnnnnnooooo. My special job" he said and fell to the ground as if he lost everything, catching his head in his hands.

"What?" Asked Gray who walked up to the request board.

"What is the meaning of this?" said Erza as she walked towards the group formed in front of the empty request board.

"Erza, the request board," said Lisanna and she looked at the empty board and her jaw hit the ground.

"What! Who took all the jobs" said Erza and turned to Makarov. By all jobs, she meant the high rewarding jobs in the normal jobs category, which give more than 100,000 jewels which comes between C-class to A-class difficulty.

Makarov was giggling like a schoolgirl as he went through the pages of the book given by Naruto. He felt stamping something but squashed as an image of his mind grabbing those sweet roun-.

"MASTER" came the voice of Erza. He looked in the direction of the voice to see an angry mob of Guildmembers walking towards him, led by Erza.

"Yes, my children. What a pleasant day it is" he said trying to divert their attention off him as he still didn't know the cause of this riot against him, from his happy children.

"Yes, it is a pleasant day. It would have been more pleasant if only we had more jobs to do" said Erza in a sweet tone.

"Yes it wo-Huh?!" Said the old man and glanced at the request board to find it empty compared to its normal requests capacity.

"Who took them, Master?" asked Erza in a demanding tone. 

"Ah, I don't know," he said with a confused expression. 

"We are going to find it," said Erza and started giving orders to all the assembled members. They don't know all their efforts are going to be in vain as at the end of the day, they couldn't find anything and it is going to be a mystery until the blonde boy who did it returns from all those jobs.

Meanwhile, In an Unknown Location 

In an unknown location, a group of people assembled to discuss the way of things and their goals. These individuals hail from different Guilds and they are not particularly fans of light.

This group consists of Dark Guild members. Dark Guilds are guilds that are not officially recognized by the Magic Council; therefore, they are treated as criminal organizations.

There is very little information known about the hierarchy of Dark Guilds even to the Magic Council. Only details like their Masters and their Guildhalls are known and in some cases, that information is also not known. Like in the current scenario.

All Dark Guilds, like legal guilds, are run by their respective Guild Master. Some Dark Guilds have S-Class level Mages, but it is unknown if they are referred to as such. 

The currently assembled individuals are more special even among the Dark Guilds as they belong to the strongest Dark Guilds as they are not measly members, rather, the Guild Masters of the three strongest Dark Guilds. These individuals are Brain/Zero, Hades and Mard Geer.

First was Brain or his alter ego, Zero. Brain has neat silver hair that reaches his shoulders, dark eyes and dark skin. He has unique markings on his face that take the shape of straight black lines. He is slightly taller and more muscular than most people.

After Brain's alter-personality Zero is unleashed, his appearance changes slightly. His hair becomes wavier, his eyes have turn into blood red, his skin becomes a much paler colour, and his outfit becomes something reminiscent of a military officer's outfit. Brain's Oración Seis mark is located on his chest.