Things are going to start kicking off. Pretty much a battle every chapter. Wait, I was already doing that? Oh... Reviews and constructive criticism is welcome. Enjoy!

Chapter 35

Natsu was violently growling on the ground, the majority of his transformation had finished. He was breathing heavily, eyes focused on Zeref.

"Done." Zeref said gleefully. "Ok, I think I can release you." With a snap of his fingers, the magic circle around Natsu vanished. Natsu jumped to his feet, crossed the distance between him and Zeref, and had him by the collar.

He growled angrily, eyeing the black wizard.

"You wish to fight?" Zeref asked politely. Natsu threw the man towards the ground before releasing a burst of fire into the air. Spreading his wings, Natsu took off into the sky. Screaming fiercely, he crashed into Acnologia, surprising his fellow dragon slayers.

"Salamander!" Gajeel yelled in annoyance.

"N-Natsu?" Happy asked nervously.

"That's not Natsu..." Laxus said slowly. "Did you hear Zeref? That's E.N.D..."

Natsu roared in anger and he unleashed blast after blast into Acnologia, who cried out in pain.

"He's doing damage?" Acnologia thought. "Impossible."

Natsu used his newly-found vice-like grip and grabbed Acnologia by the throat. Twisting his body, he threw the huge dragon into the mountain, making friends and foe scatter. He hurled a ball of fire towards the dragon, then set his own body on fire and fell like a meteor towards the creature.

Gray and Erza watched Natsu crash into Acnologia, a cloud of smoke and dust flying into the air. Gray spoke.

"You see Erza. That's E.N.D, Zeref's most powerful demon. He needs to be stopped."

Erza raised her sword towards him before retaliating. "That's Natsu. Our friend Gray. We can't kill him."

"He'll kill hundreds more unless we stop him." Gray snarled, raising his own sword.

"Why do you insist on that!" Erza asked in annoyance.

"Why do you think my dad gave the last of his power to me?" Gray countered. "Why do you think the necromancer was able to make him live, past his own death. He had a goal Erza! His goal was to slay every demon in existence. That's why he gave me the Ice Devil Slayer magic. He wanted me to finish what he couldn't do. He wanted to me slay E.N.D! I won't let his death be for nothing!"

"And what, murder Natsu is the process?" Erza questioned irritably. "Let the bond between you two go? Let one of our strongest members perish? Let a family member die? I won't let you!"

Gray growled before lunging towards Erza, blade held high. Erza blocked the attack and countered, pushing Gray back. Gray snarled again before creating an ice spear, slashing at Erza's side. The S-Class wizard grunted in pain before re-quipping into her Flame Empress Armour, melting Gray's weapons.

"I don't need my ice weapons to win Erza!" Gray shouted. "Besides, my devil slayer magic can't be melted away. Ice Devil Zeroth Long Sword!" An ice blade covered in black markings appeared, Gray gripping it tightly. He slashed it at Erza's blade, making it shatter instantly.

"What?" Erza gasped. Gray attacked again, sending Erza flying into the dirt.

"Do NOT, get in my way." Gray spat at her. Erza was breathing heavily, a trail of blood coming from her mouth. She looked at Gray, noticing black markings covering his arm and slowly spreading over his chest.

"You feel no remorse for killing Natsu?" She said angrily. "Absolutely nothing?"

"Of course I do!" Gray snapped as Erza got to her feet. "It hurts more then anything. But that's E.N.D, the thing my father tried so hard to find and destroy. The thing that Zeref made to utterly wipe everything Erza. I don't care that it's Natsu." He stopped, watching the pinkette beat Acnologia down, fire spewing everywhere. "Look at him. He can't even talk, can't communicate. And we're meant to leave him. No."

Gray raised a hand and covered his heart, closing his eyes. "It won't happen. Ice Heart." He gritted his teeth as ice spread over his heart, covering his chest. He opened his eyes, his once dark blue eyes gone, replaced with empty grey ones.

"What... did you do?" Erza asked slowly, bringing out a spear.

"Used Ice Heart." Gray said simply, his voice deprived of any emotion. "The coldest spell. Used to rid its target of any emotion."

"You removed your emotions?" Erza yelled in shock.

"This is how I will kill E.N.D. With no emotion, I won't hesitate." He charged towards Erza again, who blocked the attack with her spear.

"Lightning Empress Armour!" She re-quipped, slashing her blade. Lightning shot out in all directions, Gray blocking it with his shield.

"You're pissing me off Erza." He muttered.

Natsu let out a devastating roar, slamming his scaled hand into Acnologia. The beast was battered and bruised, his chest bleeding and wings broken. He staggered to his feet, eyeing Natsu.

"E.N.D." He gasped slowly. "Zeref's most powerful demon. What a threat you are." Natsu glared at the dragon, before launching a stream of fire his way. Acnologia yelling in pain, collapsing to the floor.

"You... Etherious Natsu Dragneel..." He said slowly. "Are... a monster indeed..." Natsu stood above him, fire in his eyes. He raised both hands into the air, before striking Acnologia's head. A colossal explosion rippled across the mountain, smoke blowing everywhere. Once it had clear, Acnologia laid still, eyes empty, with a small smile on his face while Natsu growled above him.

The sound of clapping got Natsu's attention. Turning, he saw Zeref, a bright smile on his face.

"Wonderful." He praised. "Spectacular. Simple perfect." A dark shimmer went over his eyes. "But that wasn't close to what you can do, E.N.D. Here, let me spark it." In a second, Lucy had appeared next to him, struggling against his grip. "Now, you wouldn't want Lucy to get hurt, would you? Huh?"

In a second, Natsu was directly in his face, fist covered in fire. He punched Zeref, sending the mage spiralling towards his castle. The impact released a shockwave, ripping up the ground around him. Lucy fell to the floor, whining in pain. Looking up, she saw Natsu staring at her, eyes glossy.

"N-Natsu?" She groaned. Natsu stared for a moment longer, before shaking his head and leaping after Zeref.

I had no clue how do to the Natsu/Acnologia fight, so I just made Natsu beat him quickly. Sorry to anyone looking forward to that. A more detailed fight next chapter!