Author's note:

Hey, guys. This is just my prediction what will happen if Natsu became END. I hope you'll like it. I just want to express my ZerVis fandom. This is also NaLu. Enjoy!

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 Normal POV

Natsu went where Zeref told him to go. He followed him to know what he really wants. He went through different places to go in Alvarez, where Emperor Spriggan is living. He didn't bother his motion sickness and he kept thinking what would really happen. Too many questions popped in Natsu's mind. When he reached the palace, he saw Zeref waiting for him.

"So, you really came over, Natsu." Zeref said.

"What do you want?" Natsu asked.

"I want you to destroy humanity, Etherias Natsu Dragneel." Zeref answered straight on. He cast something on him.

"Destroy humanity, you say? Well I would not do it and why do you call me Etherias Natsu Dragneel? I'll never be one of your demons. I'm not like them. If you're not going to say something that makes sense, I should be going now. Nice talking to you, Zeref." Natsu said, walking away from Zeref.

"You never suprise me, little brother. You never changed, Natsu." Zeref said, talking to himself.

He went back to the guild. He didn't know what will happen if he stepped inside the guild. When he opened the guild's doors and stepped inside, he had a terrible headache while black magic is surrounding around the guild. The clouds turn gray and fireballs started to start shooting all over the place.

Fairy Tail members started to panic. They were all in a total shock and fear, especially the young ones in the guild. Lucy became worried of what's happening around her. She's really worried of what's happening to Natsu. After a few minutes, he became the most fearful and strongest demon that Zeref created, END.

"Hahahaha!" Natsu laughed, evilly.

"Natsu, is that you?" Erza asked. Fear was building in each and everyone's mind and heart.

"Nope, dumbass. I'm the ultimate END. I would kill you if you don't know me and ask me again who I am." Natsu threatened. Erza flinched in fear.

"So, Natsu, you are the END! I should kill you at all cost!" Gray said, tranforming to Ice Devil Slayer mode.

"Don't call me Natsu, filthy fairies! You should all die!" Natsu said, angry.

"How dare you call us 'filthy fairies'?! You are a big fool and an idiot for you to say it!" A group of members of Fairy Tail raged.

"Shut up!" Natsu shouted.

He cast a magic on his surroundings and that cost humans to be thrown by the impact as well as the houses and things. He cast a magic again to Gray and Gray was thrown a few miles away from the guild. When he was finished destroying everything, he walked away from the humans to destroy the whole Fiore. Other guildmembers were about to run but Mavis stopped them.

"Stop." Mavis ordered.

"But why, First Master? He called us 'filthy fairies'. Are you not angry at him?" A guildmember asked.

"Yes, I am but I know that he isn't Natsu. He made a big damage to our guild. We are all wounded. We can't just go after him just like that." Mavis answered.

"I agree with First Master. I truly believe that he isn't the Natsu I know, I consider as a friend. We should formulate first a plan before we go after him." Lucy stood up to stand up in Mavis' side.

Meanwhile, in Zeref... (A/N: ...my beloved! XD Sumimasen, I really just love him!)

"So he finally started. He could reach me and kill me now." Zeref said.

"What do you mean by 'finally started', Emperor Spriggan?" God Serena asked.

"The ultimate END is coming here." Zeref answered.

"The END is coming?!" The Spriggan 12 exclaimed.

"Yes and he's heading this way." Zeref added.

"So, is he in our side?" Brandish asked.

"I don't know, Brandish." Zeref answered.

"I hope he is eventhough I could be stronger than him." Azir said.

"Let's prepare." Zeref said, holding the END book.

Back to the fairies...

"So, are we going to go now, First?" Lucy asked.

"Yes, let's go!" Mavis cued!

They all started chasing Natsu in his END form. They went to deep forest just to reach him. They already planned something to beat him. They don't know that the END book is with Zeref all along. The one that Mard Geer was holding was fake.

"I hope that he's going to be okay." Lucy said, running along with Mavis.

"You really are worried about him, aren't you?" Mavis said, running.

"Yes because he's the one who's always there for me to be with me and save me in my journey of my life. For short, he's my bestfriend." Lucy agreed. Mavis smiled.

"We're finally here." Mavis said.

They all paused in running. They saw Natsu in his END form, facing the Spriggan 12 with Zeref. They all knew that he's going to fight the 12 and Zeref.

'Natsu, I'll always believe and trust you. I hope that you'll be back in Fairy Tail. I would really be miserable if you don't.' Lucy said to herself.