It was late afternoon as Aku sat under a tree in the field outside of Ponyville. He could hear it all going on in the distance. The chaos being caused by Tirek and his magic stealing ability caused as he waited. The man simply bided his time until he decided that it was time for him to step in on the whole matter. While he did promise to help the princesses with their power issues with Tirek, he was going to do it on his terms. The man simply sat there with his eyes closed as the wind blew past him, letting the leaves dance around his form before he went deep into thought.

“Now that these ponies have a big problem that they can’t handle themselves, it is all chaos and destruction. I really shouldn’t have agreed to help them. But, a deal is a deal. And I do not go back on my deals.” he said to himself as he then stood up and dusted his jacket off and gazed around. Aku suddenly felt his onii side stirring within him once more. As if indicating that a strong force of evil was getting closer and closer. And the beast within was hungry for it.

Suddenly, something caught his eye. He looked up and saw both Tirek and Twilight trading magical blows while soaring through the air. He made his way closer to the fight in view until his aura started to flare up once more. The closer he got, the larger it became. Aku’s left demon arm began to tingle and pulsate. No, he wasn’t having a heart attack, that is just how the limb seemed to react now that Aku had been fully awakened.

While Twilight and Tirek took a minute to trade insults and talk, Aku took this time to clear his throat to make his presence known to both of them. Both were shocked to see him approach the battlefield in such a casual manner. “A-Aku?! What are you do9ing here?! This is no place to just be walking about!” Exclaimed Twilight as she flailed her arms about. As Aku’s eyes fell upon Tirek, he did notice the physical change in him. Knowing full well it was from absorbing magic from other ponies however, he wasn’t impressed at all. He simply sighed and shrugged his shoulders “Why am I not surprised you took the easy route to improve upon your power by stealing it from others?” Aku asked in an almost disappointed, fatherly tone.

“Because, these weak minds and bodies of these equines don’t even use their magic properly. So why let them waste it when I can be the one to use it the way it is meant to be used? To rule ruthlessly! And soon enough, I will make all the princesses in this land bow to me!”. Aku cracked a smile at Tirek’s words and gave him the most smug look ever “Huh, I actually made two of them bow down to me last night. And I didn’t need to go and steal their magic or take over their kingdom. I just had to make a deal with them.”. Tirek blinked a few times before balling his fists up in anger “You liar! There is now ay they’d bow to someone like you. You do not possess any magic or real power!”. Aku’s smile slowly faded into a neutral expression before he tilted his head. Clearly, the beat down from last night must have slipped Tirek’s memory

Aku picked up a nearby rock as Tirek turned his attention back to Twilight. “Once I steal all the alicorn magic from you, I will be unstoppable-gah!” Tirek screamed as the rock whistled through the air and nailed him right in the side of his left eye. Aku stood there while tossing another rock up and down with a look of disapproval on his face “Look, it is time for you to give everyone back their magic and go home already. I don’t want to have to deal with this as much as I have to already.” he said in a rather annoyed tone of voice now. And unless you want to deal with the other side of me, you will do as I say.”. Tirek’s horns began to glow as they powered up and suddenly shot a massive beam of concentrated magic at Aku, hitting him directly. Twilight cried out in horror with an extended hand towards Aku. But it was too late. Twilight’s eyes began to well up with tears, thinking that the man was surely dead. However, her expression changed to astoundment as he stood there while dusting off his jacket.

“You want the onii then? Fine by me.” he said as he closed his eyes for a moment before snapping them back open. They glowed a fierce dark purple before Aku wrapped his own arms around himself and began to laugh maniacally, two voices now overlapping with each other as the physical transformation began. It wasn’t just his arm anymore. Aku was now in the full image of his onii spirit, standing as large and bulky as Tirek was now. Aku continued to laugh and howl through his transformation until it finished.

What Twilight saw chilled her to the bone, a constant shiver running along her spine which caused her wings to freeze up and her ears pin hard to the back of her skull. There Aku stood, a monster with large oni horns, dark slate gray skin and large sharp teeth. His once long straight hair now wild and seeming to flow on it’s own without any kind of wind. Not only did the transformation go off smoothly, But Aku was in complete control and fully aware of what was going on. He looked down at his hands and squeezed them into fists a couple of times before cackling.

“Heeheeheeeeeh..it feels rather good to have shed my humanity after all this time. ANd now, I have nothing holding me back!”. Not even giving time for Tirek to respond, Aku rushes forward at breakneck speed and collides into the large centaur. The impact sent a shockwave which threw Twilight back into a large rock. “I am going to enjoy killing you and devouring every single part of your being to boot! Yiaahahahahaha!!!”

After those words, the sky started to darken as the moon rose and the night sky became crimson red. Foreign buildings and trees began flickering in as the world changed around them, a crimson rain starting to pour heavily from the sky as Aku and Tirek began to go at each other. Knowing full well now that magic wouldn’t work against Aku, Tirek had to now rely on his brute strength. As everything that was flickering in now became solid, it was like the building and architecture of the feudal period of japan. But, it looked more like it was warped and twisted in the world of yokai with dead bodies and remains all around the area now.

Twilight was absolutely frozen in fear now as she saw the world change before her eyes. She suddenly remembered something that Aku had told her back when he was first staying with her. Something about how there were two different worlds. The human world, and the yokai world. Was this the yokai world he spoke of? She quickly got to her hooves and moved away from the brawling beasts. As she did however, she watched skeletal remains in old oriental armor shuffle about and groan and growl with their weapons in hand, making their way to Aku and Tirek. Once Tirek had finally separated Aku from him, he shot another beam of magic at him. This made Aku slide back a few feet, but he still remained standing before slamming his hand into the ground. "Time for the butcher to do what he does best...~." Aku suddenly pulls out a large greatsword which seemed to be something out of a Nioh game. It was a pure black sword with jagged teeth that replaced its edge. And once the hilt was in Aku’s hand, the jagged teeth started to rapidly move up and down the blade, letting out an eerie chainsaw sound that echoed through the area. Aku suddenly disappeared within the pouring rain without a trace. Tirek looked around as he watched the undead moving slowly but menacingly towards him. Demonic laughter echoed throughout the new setting as Aku now stalked his prey, the grinding of the blade’s teeth also echoing out every now and then.

All was quiet for a moment before Aku suddenly swung from behind one of the large oak trees and revved the sawsword, Swinging it down to Tireks front left leg and cutting clean through it Tirek watched as his leg was taken from him, the shock preventing the pain for a moment before he dropped to the ground and howled in absolute agony as he watched Aku pick up the now severed limb and took a big chunk out of it with his mouth and swallowed it whole. Aku’s plan seemed to be working perfectly as everything that had happened and came into existence seems to have nearly destroyed Tirek’s mind. Tartaros was a paradise compared to what Aku had just unleashed upon this world.

Tirek immediately got up and started running away the best he could with just three legs now. He had run into a forest of extremely tall oak trees that weren’t there before, looking around and seeing Aku’s figure peeking around trees with his glowing eyes with that terrifying sword in full view. Trek’s mind continued to slip further into despair until he came to a sudden stop after turning his focus to his front. There stood Aku, face to face with him with a bloody smile on his face. He slowly looked down to see the sword buried in his lower torso. “May the fiends of hell be the ones to drag your body to hell and feast upon your corpse. Because you taste awful…” he growled in annoyance.

Before Tirek could try and pull away, the teeth had already sunken into his flesh. Aku gripped the hilt tighter before the teeth went to work. The sword literally ate up Tirek’s flesh and evil energy which flowed into the sword and into Aku’s body. In his onii form, the evil energy only made him stronger and boosted his constitution. Before long, Aku literally split Tirek up the middle before swinging his sword back down to finish the job. And just as Aku said, long bones arms soon sprouted from the ground and began to tear at Tirek’s lifeless body while pulling him down.

But before disappearing, all the magic that was absorbed from the other ponies was dispersed and returned. This event however, combined with the new world that had appeared in the massive field had created a massive dome of dimensional energy, allowing for a yokai portal to remain open. Aku returned from the forest to the abandoned village that had flickered into existence when the portal opened. There in the middle stood a large well where the portal was wide opened. Aku stabbed his sword into the ground and leaned over the smooth stone well and peered down into the dark, watery gate. The world he saw was unlike any other he had dreamed of back when his family told him the legends and stories of the yokai.

The world was twisted and dark, but full of ethereal light and somewhat beautiful in Aku’s eyes. It truly was a portal to the world of yokai. But was it just one world? Or were there more just as the legends spoke of? AT any rate, Aku couldn’t risk leaving this portal open. So he takes his sword back into his hand and grips it with both hands getting ready to perform an overhead strike to destroy the well. Before he can come down with one powerful swing, a voice calls out to him to stop “W-wait! Please don’t destroy the portal, sir!”.

Aku comes to a stop half way through his swing before looking down to see a small femine looking figure with fox ears and tail coming up slowly out of the portal with their hands up. Judging by the kind of shrine robes they were wearing, this must have been a kitsune yokai. But seeing how it had only two tails, it was below the rank of tenko. As the little yokai came out fully, they realized just who and what was about to strike the portal and nearly fall back into it with a shriek of terror. But before they fall back in, Aku reaches down and catches them by the back of their robe and lifts them up to face level as he looks them over with a look of amazement on his face.

“A real Kistune…holy fuck this is so cool!” He said before letting them drop onto their feet in front of him and crouched down before starting to poke gently at their cheek with a claw. “So, the stories of yokai from my world are real after all. You really do exist.”. The kitsune in question was stunned for a moment at Aku’s words. They lightly started batting at and pushing his large hand away in mild annoyance before nodding and pushing his hand down slightly. “What do you mean? Are you a yokai yourself? You have the form of a rather frightening onii. But now that I get a good look at your soul, your origins are human. Were you a wicked human in your lifetime?” asked the kitsune with wide eyes, curious as to why they haven’t been destroyed or eaten by Aku yet.

Aku shook his head as he rested his hands on his thighs. He lets out a soft sigh and rubs the bridge of his nose as he thinks of a short way to explain it all, but can’t “It is a truly long story. And here isn’t the place to explain it. I need to shut this portal down quickly before the beings of this world. But I will tell you that I am originally human. Circumstances have changed me otherwise. Tell you what, you provide me with the means to open up another portal elsewhere, and I will rebuild one for you. And since I can tell you aren’t a nogitsune, I feel like I can trust you.”.

The little fox perked their ears up and nodded understandingly “Ah, if that is all, we can go ahead and destroy this one then! But I will need to come with you to open the new one. I shall conceal myself. Don’t mind me~.” The kitsune said before poofing into a cloud of smoke and changing itself into a pipe fox before hiding in one of Aku’s pockets “Okay, you can proceed!”. Aku nodded and brought his sword back up for another overhead strike, this time coming down full force before destroying the gate completely. Soon enough, everything that flickered into existence earlier dissolved away slowly until there was nothing but the empty field once more.

Just as everything finally disappeared, Aku went back to his former form and the sword disappeared back into the ground. Just in time for the royal guards to show up with the princesses and the main six in tow. “Where is Tirek…? Did you send him back to Tartaros? Twilight told us what happened/ Where is the ‘dark world’ she spoke of?” asked Celestia as she looked around, seeing no evidence of any kind of fight. Aku looked back at Twilight before turning his attention to Celestia and her sister “Tirek is dead. That’s all you need to know.”. Celestia’s eyes widen for a moment before she stomps her hoof in disapproval “I said to STOP him, Aku! Not to kill him!”

“Guards, restrain him, and toss him into the dungeon!” Luna barked. “The deal is off! And we will take you prisoner for what you have done…” Just as the guards start to move in on Aku. A sudden round of gunfire carves a line between Aku and the guard as one of the helicopters soars down and ten soldiers drop to the ground with guns drawn. “Back the fuck off before we unload into your asses!” the ranking officer shouted as the clicking of the guns filled the immediate area. Right as when the helicopter landed, Aku was hurried into the helicopter and the soldiers back away with their guns still trained on the guards until they were all inside and the bird took off in the direction of Kazoku. “We got the boss, let's head home.” the pilot said as he went full speed.

“Looks like you were right on the money, sir. They weren’t going to honor the deal like you thought they wouldn’t.”. Aku wasn’t really surprised. This only increased his distrust in this country. And it was going to take a lot more than a little bowing to ever get him to help again. However, he had a new plan. And it is all thanks to an idea he got from his new friend who rested in his pocket.

Author's Note

I have heard your words in the previous story, most of you want me to focus more on the japanese mystisism. So that is what I plan to do. More to come when I can get around to it.

May the darkness grant you peace.