Chapter 15: The Birth of a Monster

Aku comes into contact with Eren as he dodges Aku's swings and strikes him with his right. Aku then tries to cut his right hand off but Eren appears behind him suddenly hovering over him.

"You're mine Aku!"

"Try again."

Aku then appears behind Eren as he slashes Eren's right arm off. He fell over as Aku stood over him.

"I'll beat you at your best game Eren!"

Aku goes for the final strike as he brings his "blade" down on Eren's head.

*Tink*

Aku looked in shock as Eren caught the blade with his mouth. He smiled with the blade in his mouth. Eren's  Aspect began to exceed to what it was beforehand, as the blade in his mouse began to deteriorate. Aku let go and backed up as Eren stood up slowly with only his legs. His back was still bent as he laughed aloud.

"Ohhh Aku you please me! You were so much fun!"

The air around them seemed like it was owned by Eren. His right arm began to grow back as he grabbed the car ball.

'How is this possible! I feel like I'm being wrapped by his power. Could he have been this strong all along and be able to hide it?'

"I give you credit Aku, you pushed me to a nice limit, but that push simply wasn't enough."

"Quit the small talk."

"My, My what do you mean?"

"If you're going to fight then actually try!"

Eren smiled as Aku's words were like a jingle to his ears.

"Fine but I warn you, you'll watch your sister die by my hands!"

In that moment Aku's Demon's Aspect for a split second was noticed within Eren's, as rage flooded his body. Eren then readied himself to throw the ball as he touched the tip of it with his right hand by the time it was at the tip of his finger it turned into a spear.

*Sonic boom*

'I-I can't dodge it. Its too fast I have to catch it. I have to!'

The spear went through his shoulder.

'I caught i-'

Aku's thoughts were cut short as He felt a sharp pain in his chest. Eren's arm went straight through his chest.

*Cough*

Blood spurted out of Aku's mouth like a disrupted waterfall.

"H...how?"

"It was simple really. I mixed my left arm with the car when I caught it in case you made the mistake of cutting my arms off. Ever since then I just had to wait to be able to convert it back to its normal size and back to me. I've fought many men without my arms before, you were no exception Akuma Yami!"

Aku's body went limp as his vision went blurry.

"ya...yaki..."

Aku suddenly felt like he was jolted back to life.

"You can't die yet, you haven't seen the best part yet."

Eren pulled his arm out of Aku catching him by the hair as he fell. Dragging Aku across the yard he realizes something.

"No...No stay away from her,"

Eren raised Aku in the air as he stood over a Yaki in a barrel of fear behind a bush. Aku was then dropped to the side of the ground as Eren walked towards the frightened girl. Eren then felt a tug on his left foot.

"Please...take me instead!"

Aku's Aspect made Eren shiver for a moment as Aku had reached that state again, a state only the weak can touch.

-Desperation-

'My, My how could he have hid this power from me? My body tells me even if I healed myself fast enough your Aspect would cause a fatal blow.'

Eren ripped his foot away walking towards Yaki once more.

"Look Aku, I came here to kill you, yes. However, I love killing people in two ways."

He held up two fingers as he walked and stopped right in front of Yaki on her knees.

"Their mentality is what I enjoy most! Yes...there is nothing like seeing someone go..."

Aku watched as Eren placed his hand on Yaki's head.

"Mad!"

Yaki was then raised into the air by Eren as he laughed.

"Aku! Prepare to see a masterpiece!"

*Crack*

Yaki's Aspect spiked then disappeared.

*Biff*

Eren dropped Yaki's lifeless body.

'Ya...yaki?'

"How fragile,"

Eren began to walk towards Aku.

"With that being over, I guess it your tur-"

*Shriek*

The air became as dense as a black hole as the energy causing it had the weight of one. It enveloped Eren and Aku within its limitless range. As Eren thought to himself with insanity.

'What power could this be from?'

Aku watched in fear as Eren turned to the same sight. Yaki floating in the air with her right eye being white lines (vertically) and black smoke that hollowed out. Aku saw his sister's body but he knew one thing for sure.

'I can't sense Yaki at all.'

Yaki's Shiryoku was forced open straight to a form that takes some, their entire lives to accomplish.

"A Second state Shiryoku! A beauty just like me!"

Yaki's head turned toward Eren, he reminisced as the air trembled.

'That smell is a lust for blood. That isn't Yaki, it's almost as if she's turned into a monster.'

Whatever this power Yaki was given it didn't matter, because in that moment Yaki did not have any sense of control over it. That power was all that was left, Yaki was gone. The only thing of Yaki that remained was the image of Natsuki dying.