3 months later....

One by one, every Fairy Tail member who had undergo the 'Hell' level training started to return.

The first one was Erza, she brought along with her some horns, scales and other proofs that she hunted down fifty s-class beasts.

Gajeel and Gray are next, they were pretty beaten up, their bodies are full of injuries, but it was not life threatening.

Then Mira and Laxus along with Happy and Lily also returned, of all the people here, their group are the one that suffered the most.

They were being played around by those saint-class beasts like they are some sort of a toy, and they couldn't even fight back!

If it wasn't because of the cloak that given them, then they would've died the moment they met them.

Only Lucy and Wendy still hasn't returned, they waited for awhile until Ultear 'asked' Mest to bring them here.

It turns out that the two of them has yet to hunt and collected fifty s-class beasts.

"Haaa~! I will never going to train with Natsu ever again! I lost count on how many times I almost died!" Lucy complained as she layed down on the sofa.

"Argh~ my body is still in pain, I couldn't move a muscle, damn flame-brain." Gray said, his body was covered by bandages. Then he look at the ceiling and thought, 'Well, at least I'm already proficient on Titan Slayer magic.'

"Gehee~! At least our strength increased so much, I feel like I can beat salamander now." Gajeel said, as Ariel, who is leaning on the wall, suddenly burst into laughter.

"Hahahaha! Oh that's funny! Hahaha!" Ariel clutched her stomach while laughing until tears gathered at the corner of her eyes, "You think you can beat master? Every wizard saints doesn't even dare to compare themselves at him much less you."

Gajeel snorted and remained silent, even though her words are true, bu5 damn it still hurts his pride.

"Hmm, come to think of it, how come flame-brain became one of the Four Gods of Ishgar? What happened to the other one?" Gray asked while taking a glance at Ariel.

"He went rogue." Ultear was the one to answer after coming out of the kitchen.

"Rogue? Did he joined other country or something?"

"Yeah, he joined Alvarez Empire and became one of the guards of the emperor. Do you want to know who he is? The one who went rogue i mean?"

"Who is it?"

"God Serena, the strongest(formerly) mage of Ishgar." Ultear said, shocking everyone in the house.

"Damn~ then the Alvarez's strength increased by level." Gajeel said, after all God Serena's title as the strongest mage Ishgar is not just for show.

Ultear smiled and shook her head, "I don't think so, from what I heard, God Serena's strength should be at the very bottom."

"What!?" Now, even Laxus, Mira, and Erza was staring at Ultear with eyes widened in shock.

"If the Ishgar has the Ten Wizard Saints, then the Alvarez has the Spriggan Twelve, I have heard that each Spriggans has the power to destroy countries on their own, though I don't know if that's true or just exaggerated, but it doesn't change the fact that our so-called strongest mage is rank at the very bottom."

"Everyone, the food's ready, its time to eat," Kagura and Meredy went out of the kitchen and called out.

.....

On an inhabited island, a handsome man with crimson hair, with a white scarf wrapped on his can be seen. He was floating a meter above the ground, two demonic-horns sprouts on his forehead.

A dark-crimson tattoo can was imprinted on his right eye(you know, like Meliodas) his arms waa covered by a dark-crimson scales(like in the anime, when he fought Gray) and a darl-crimson flames in a shape of a wing was on his back.

From time to time, dark-crimson lightning sparks will appear around his body.

This man, was Natsu Dragneel.

He clenched his fist as he glared at the distant sea with a cold and indifferent look, then with swift movements, he threw a punch.

The air shrieks and trembles, causing a powerful air pressure that splits a large part of the sea.

"Good, now, I won't lose to Acnologia anymore."

Suddenly, Natsu felt someone appearing behind him, he looked over his shoulders with a cold look, "Brother."

Zeref's eyes widened when he heard Natsu's words, however he soon snapped out of it as he gave him a gentle smile.

"You finally called me that, Natsu." Zeref said with a smile as he sat down on the ground, "Have you...accepted yourself?"

"Mn." Natsu nodded before setting his gaze towards the sea once again, "I made some thinking, if those guys are really as strong as you said, then, unless I use everything I have, I won't be able to protect everyone that I love."

"This Etherious form, my demon self, is also me, it is part of me," Natsu said causing Zeref to smile and closed his eyes, "However, I am still me, I am no E.N.D, I am me, the Fourth Master of Fairy Tail, Natsu Dragneel."

"That's good enough," Zeref said with a smile, "That form...what would you like to call it?"

Natsu thought for a moment before replying, "....Demonic Overlord."

"Nice, now you only need to take your book and rewrite it to severe your connection to me, I guess August or Irene can help you with that." Zeref said before continuing, "Your book is in the hands of Mardgeer(?) take it yourself and give it to me, you still have a score to settle with them, right?"

Natsu grinned as a terrifying amount of bloodlust surged out of his body, every living things near him flee in fear while some weaker ones slowly died, even plants and trees began to show signs of decaying.

"That's right, it was because of them. It was because of them that Ariel...." Natsu did not continue his words, he gazed at the sky before disappearing, leaving three words to Zeref.

"I'll destroy them."