Fairy Tail-Transmigrated In Order To Sleep With Babes

(Third Person POV)

"God-Killer?" Acnologia said, "What is this? A toy made out of scrap metal?"

As the Mecha hovered in the air across from Acnologia, supported by boosters on its back, Jason's voice could be heard from its head. 

"This weapon here is the one to give you a run for your money." Jason said, "I'll show you what kind of power it possesses. As of right now, think of this as my body, an extension of me. It is merely an Armor around me while I act as its core, fueling its overwhelming power." 

Jason was right, This Mecha was just more than a vehicle of destruction. It was to act as an extension of himself, an armor with weapons that aided him in battle. 

In an instant, Acnologia flew straight at it, crashing against the Mecha with a powerful headbutt that sent it flying back hundreds of meters. 

"Futile!!!" Acnologia bellowed, "A mere construct of iron stands no chance against I, The Dragon King." 

As the Mecha straightened itself in midair, Acnologia noticed there was no damage on it. 

"You don't understand do you?" Jason said as he raised the massive cannon on the mechanical arm, "Allow me to display its capabilities." 

"Black Light Cannon" 

In an instant, the massive barrel released a powerful beam of black light that shot straight at the Dragon King. 

"Magic is useless against me." Acnologia said, "This will not affect me in the sli-"

The beam hit him directly, causing a massive explosion that dwarfed him completely, causing a powerful shockwave that shook the air itself. 

"Maybe this will change your mind." Jason said as he lowered the cannon

From the smoke and flames, Acnologia emerged, his body slightly charred and bruised. 

"This..." He said, "It is impossible, how was that able to hurt me.....?" 

Without saying a word, Jason then rushed at the Dragon King in an instant, ramming the mecha's open palm into his face before clutching its God-Steel fingers on his jaw, dragging Acnologia alongside it as he flung the Dragon into the mountain.

As Acnologia hit the mountain, causing a massive shockwave that shattered the earth, Jason raised the massive cannon on the Mecha's hand and charged up another Black Light shot. 

Suddenly, 6 massive rail-gun cannons appeared around the God-Killer, slowly spiraling as they rotated slowly around it. 

"Black Light CannonxSix Holy Bullets: "

Jason aimed the cannon and Rail-Guns at Acnologia who was emerging from the massive dust cloud. The Dragon King looked up at this, completely stunned at the fact that he was overpowered physically with ease. 

"God-Killer's Judgement" 

Jason opened fire, releasing another beam of lights and six different 120% power Rail-gun payloads that hit Acnologia directly, causing a massive explosion that immediately disintegrated the rest of the mountain. The explosion's shockwave was able to hit the God-Killer, causing it to stagger as it stayed in midair. 

"Damn." Jason said through the mecha's head, "That was a lot of power...." 

The six rail-guns then disappeared as Jason lowered the cannon as he looked at the massive cloud of smoke and flames. 

"UNACCEPTABLE!!!!" Acnologia's voice bellowed as he emerged from the cloud

He was covered in bruises as his scales were charred slightly. It was clear; he was taking some damage, something that should've been impossible due to his immunity to magic. 

In an instant, he lunged at The God-Killer, swinging his claws at it. Jason backed up but the claw was able to swipe through the cannon on his hands, destroying it immediately, causing a small explosion that sent him reeling back in midair. He then aimed his mounted Gatling guns at the Dragon King, opening fire. 

The massive caliber rounds hit Acnologia on the face, causing massive shockwaves. The Dragon King noticed that they were enchanted with powerful magic as they were able to make him feel a bit of pain, almost like ants biting a human. 

"I can feel this?!" Acnologia said as he reared his head back, "UNACCEPTABLE!!!" 

He opened his maw, charging up his magic power as he readied a breath attack, firing it at the God-Killer almost immediately. The massive beam of pure magic power hit the Mecha, driving it straight to the ground and causing a massive explosion similar to the one that destroyed the mountain. 

As the explosion erupted, the ground shattered, and the air shook violently, Acnologia flapped his wings above in the air looking down at this, appalled by what had just happened. 

From his perspective, no magic should be able to harm him. This wasn't the first time it happened. When he had attacked Erion in Alakitashia, he had felt the same when Jason used his Airspace spell on him. Although minimal, he did feel it. And that bothered him greatly. 

"What is the meaning of this?" Acnologia said as his minor "wounds" healed, "I should not be affected by pathetic magic." 

The massive cloud of smoke and flames suddenly dispersed, revealing the mecha seemingly unharmed. 

The Dragon King looked at this, "No effect?" He asked, "Impossible." 

As much as it bothered him that he was able to feel Jason's attacks from the Mecha, he was beginning to feel a bit curious about how this was possible. 

"Barrier defenses enchanted by my Sage God Slayer magic." Jason's voice was heard from the Mecha's head, "You're probably wondering why my magic is affecting you, The Magic Dragon." 

Acnologia looked at him, "Hm." He said, "It matters not, I will not be defeated by you." 

"I wouldn't be too sure about that, Acnologia." Jason said, "You see, this Mecha isn't just any weapon like I said before. This is the Pinnacle of my War Magic!" 

"Oh?" Acnologia said, "Is that so?" 

The God-Killer extended its arm and morphed into a massive rail-gun cannon that aimed at the Dragon King, charging up black light. 

"Back when I briefly fought you." Jason said, "I noticed that my War Magic was able to hurt you, like a small nick on an impervious armor." 

Acnologia then charged up magic power on his maw, readying another breath attack. He then opened fire at Jason, a massive beam of magic power shooting straight at the God-Killer mecha. Jason would then return fire, shooting a massive beam of black light that collided with Acnologia's breath attack. 

The collision caused a massive explosion that darkened the atmosphere and shook the air violently, shattering the ground beneath. 

"Whatever you're spewing...." Acnologia said, "I have no interest in it. I don't care if you can harm me, it will not be enough to defeat me....." 

"Your previous reaction proved otherwise." Jason said, "You see, this is the combination of my War Magic and my God Slayer Magic. War Magic allows me to create physical objects that are boosted by magic power. But for some reason, they're not classified as Magic. It's like my War Magic defies the natural laws of magic, Acnologia. That is why you're not immune to its effects!" 

Acnologia looked at him, "What?" 

"War Magic is your only weakness." Jason said, "And this Mecha is the product of the combination of War Magic with God Slayer Magic. Using God-Steel and Advanced Core, I used Machine God Slayer to create this Mechanical extension of myself, boosted by all of my God Slayer Magic. This means that I can use my God Slayer Magic while in this armor which will in turn act as War Magic." 

Acnologia looked at the Mecha, completely stunned by what Jason had just said. As ridiculous as it sounded, it only made sense why he was able to be harmed, only slightly, by the attacks. 

"Impossible." He said

The God-Killer then lowered the railgun cannon, morphing it back into its hand. It raised its left arm, summoning a curved black blade on its forearm, emitting black energy. 

"God-Killer Blade: " 

In an instant, The Mecha launched itself at the Dragon with tremendous speed, rushing past it high above in the skies. 

"What?" Acnologia said as he looked above, "What did you-" 

A massive black shockwave erupted from his chest as a large cut appeared, spewing out blood. 

"Deathrift" 

"Gahh!!" Acnologia said

"I think I will be able to defeat you with this." Jason said as he raised the massive sword on the Mecha's arm, "It was supposed to be used against Zeref, but it's perfect against you."

"I'll kill you with this."