A/N: Thanks for the review, BlindLight98
"Stop for a moment", Acnologia said, "I've been thinking. Although you may not be strong enough to defeat the likes of Zeref, or me, I'm certain you may be able to defeat some dragons."
"Defeat dragons, as in, I'm going to kill them?" Natsu spoke coldly. The years of training with Acnologia had taught him to hide his fear and other emotions. 'Emotions and Feelings are what the weak and losers talk about' he had said. Natsu's father, who was the Dragon King, Acnologia, had a nickname, The Black Rock. It wasn't too hard to understand why. The black dragon was known for his lack of empathy when he went on massive killing sprees, and in his eyes, lives weren't worth anything. Natsu had originally not wanted to kill; he only wanted to be stronger so he could protect those he loved. Acnologia had different plans for him. "It's kill or be killed" he had said. Through ages of emotional training, Natsu had finally become a cold-blooded killer, much like his father. He stood for no values and empathized with no one. He'd learned to avoid the pain his victims were going through. He no longer saw his opponents as enemies, but rather, prey. He had burned down several villages like his father, and had acquired himself a title amongst humans and dragons alike – "The Cold Prince"
"You will not be able to do so with the power you currently have. Most of the other dragons are almost on par with my skill level. You will need the help in order to defeat them" Acnologia's voice interrupted Natsu's thoughts. "I will bring you to the Gates of the Etherious, where the most dangerous demons are kept. There, you will gain their power, and be able to transform into a demon yourself." Natsu couldn't help but shiver at the thought of becoming a demon. So I'm really doing this. I'm going to kill dragons as a demon. "Meet me in the underworld. Its coordinates are X-63 Y-79, H- Negative 666" the large dragon demanded before vanishing into thin air. "Alright, looks like it's time to do this," Natsu muttered to himself before creating a large portal in front of him. CHAOTIC VOID! Chaotic void was a spell that allowed Natsu to get from one place to another almost instantly. However, he could only use it if he's been to the destination before, or knew its coordinates.
Natsu reappeared from the void. He observed his surroundings and found the underworld to be rather desolate and barren than he had expected. "Yo Acnologia, where are you?" he cried out to the empty space around him. I swear, he told me the coordinates were X-79, Y-63, and H -666, right? "No, you idiot, I told you to go to X-63, Y-79, not the other way around." Natsu turned around to see his father majestically sitting on the other side of a large chasm. "Sorry." The dragon beckoned him to the other side. CHAOTIC VOID! Natsu appeared within a split of a second.
"By thy ancestor, the great Lucifer of the Leviathan 5, from the depths of the Underworld, I call upon thee, Etherious of the Present, Sitri!"
Having just heard his father's chant, Natsu anticipated that a great big monster Devil, like the ones he had heard about in old folktales of Demons destroying towns, would appear. To his surprise, the "demon" that joined them almost looked human. She took a quick bow and introduced herself. "I am Sitri, one of the 7 Great Satans of the Present. I am a descendant of the Great Lucifer. You summoned me?" she asked the dragon king with a serious look on her face. "Yes, I did. I am the Dragon King, Acnologia, and this is my son, Natsu Dragolia. I am here to request for you to bestow your Demon Magic upon him so he can transform into an Etherious by borrowing the power of the Underworld." The Dragon King addressed the demon with great respect. This was a rare occasion for Natsu and he gave special attention to Acnologia's irregular display of manners.
Sitri glanced at Natsu for a moment, then narrowed her eyes and frowned. "Are you not willing to fulfill the request of the Dragon King?" Acnologia demanded, visibly annoyed that Sitri had to think about the matter. She opened her mouth to protest. "No it's not that, it's just-" She whispered something into Acnologia's ear that Natsu, even with his enhanced hearing, could not pick up on. Acnologia's eyes shot wide with shock, and he glared menacingly at Natsu for a moment, before he boomed, "Go play over there for a bit. Can't you see that we don't want you to hear what's going on?" Natsu hurriedly ran off. I wonder if they're talking about me. Natsu once again enhanced his senses and perked his ears up to try and hear anything. They must be communicating telepathically. He looked over to see Acnologia with a wide smirk over his face. "Let's go Natsu; it's time for your training." Sitri had vanished, and for some reason, Natsu had wanted her to stay.
"Since you cannot become a demon, Natsu, I will finish your Chaos Dragonslayer training. Let me show you some secret arts." Acnologia gathered up magical energy in his mouth, and bellowed, "SECRET ART: HYPER BEAM OF DISCORD!" Natsu conjured up his own magical energy and realized that this was far stronger than his Roar. "SECRET ART: Chaos Dragon's Horns of Disembodiment!" Natsu copied the dragon and his own to arms became blade-like, taking up the features of a dragon's horns. They were sharp at the edges. Natsu poked himself in the shoulder, and he drew a bit of blood. "Wow, these would be deadly in combat" Natsu announced to the world. "Against humans, yes, but they are only enough to damage Dragons by a small amount. " Natsu nodded his head. After months of secret arts training, Acnologia proclaimed that Natsu was ready to take on some dragons. "CHAOTIC VOID – METALICANA!" Natsu screamed in delight as he vanished.
Natsu steadied himself as he appeared in a massive field. In front of him was the Dragon King of Iron, Metalicana. "Who are you?" the dragon inquired. "Your End" Natsu replied.
CHAOS DRAGON ROAR! Natsu shot a beam of swirling dark purple out at the Iron Dragon. He shielded it with his large mechanical wings. "You think you can defeat me? You can try!" he taunted. CHAOS DRAGON WING ATTACK! Natsu leaped onto Metalicana's back. "I will defeat you! Acnologia said that I must!" Metalicana's eyes shot wide open as his opponent mentioned the name of the Dragon King. He whipped his tail at his attacker, slamming him into a huge mountain. ACTIVATE DRAGON FORCE! A pair of raven-black dragon wings sprouted out of his back. Horns forced their way out of his forehead. His canines became noticeably sharper. Natsu had become a Dragonoid. His face was covered in pearl-black scales. Ugh… This is so painful every time. He was holding back, trying not to show his pain while undergoing partial Dragonification.
Metalicana let out a gasp of horror. Did he master the Dragonslayer art? Gajeel hasn't even reached a tenth of his power! His eyes became narrow slits. "You're too dangerous. I should exterminate you before you become a threat to everyone in Earthland." The iron dragon tackled Natsu to the ground. "Oh? I feel like I'm the one that's going to eliminate YOU!" Natsu gathered up a large beam in his mouth, and blast the unfortunate iron dragon with 80% of his power. Metalicana was out cold. Natsu finished the deed when he muttered an ancient banned spell of Death. CHAOS DRAGON SECRET ART: BLACK EXECUTIONER! He conjured up a large Axe of magical energy that glowed in an aura of black. The ax came crashing down on Metalicana's head. Natsu walked up to his head and absorbed his magical energy, as well as his magic.
"Iron Dragon's ROAR!" he cried, to test out his new powers. A beam of edges and metal blades came rushing out of his mouth. Satisfied, Natsu reverted to his human form. His wings tucked in, returning underneath his skin. His horns faded away, his canines returned to normal, and his tail disappeared. The aura around him faded, and the Dragon King smiled to himself in satisfaction, proud of what he had just witnessed.
Natsu cleaned his wounds and summoned a portal in front of him.
CHAOTIC VOID – Grandeeney!
A/N: I hope you enjoyed! Once again, Criticism accepted. I hope you understand how Natsu's going to start his relationship with Mirajane, after encountering Sitri.