Disclaimer:

All characters, settings, etc. that are recognizable are the property of their respective owners. I am not associated with them. I do however own any original characters or ideas etc. that you find within this story. No copyright infringement intended.

Theory of Relativity

Written by: Northerner7

Secure pocket dimension

This was it. Before him hovered a massive gray rock. It was cut into a perfect diamond. Runic symbols covered every inch of the rock. They glowed a pale yellow. Silver holy chains helped bind the rock and keep it sealed. A large shimmering yellow barrier hung in the air around the rock.

The overwhelming holy energy concentrated on the rock was intense. The majority of it was being used on the seals that bound the rock together. The barrier around it was a last minute protection that the exhausted biblical god had erected before he had rushed to the battlefield a dimension away.

"It's amazing… Somehow he managed to channel part of heaven's energy into this dimension to have it continuously renew these seals. Truly the lord is great."

"Well if you had to go through all the trouble of subduing 666 then sealing it away, I bet you wouldn't want it breaking out quickly afterwards either."

Rizevim and the other members of Qlippoth chuckled in amusement at his reply. Their unwilling member who had made the first comment could do nothing but glance nervously between his laughing captors.

The barrier surrounding the rock was very powerful. Even as tired and rushed as he was the biblical god was able to place a barrier that only his faithful believers could enter. Rizevim's earlier brute force attack hadn't been enough to crack it. The one among his group with any skill in regards to barriers was able to discern a glaring loophole in the barriers construction.

In his rush to arrive at the raging battlefield, the biblical god had not put any extra security measures on the barrier. So a faithful follower of his could enter the barrier and disable it from inside. Rizevim had found a priest who greatly valued his sister. With the threat of his sister and her family's life on the line, the priest had agreed to help break this barrier.

"Do it. Now!"

The priest easily passed the yellow barrier and began chanting from inside. He had no idea what was inside this rock, but he hoped the heavenly father would forgive him his weakness in this moment. Then several minutes later the barrier fell and Rizevim grinned cruelly.

"Good. Kill him."

One of his subordinates shot forward and quickly decapitated the priest. The head and body lazily floated forward and bumped into the rock. As it was the only source of gravity in this dimension.

Rizevim flapped his wings and moved toward the rock. He gave the seals a glance over and while not versed in runic seals was none the less impressed by what he could tell of them.

"See this here you guys, this is close to 20,000 SS-class holy seals and if I am correct at least 100 SSS god tier seals. This is some serious sealing power."

One of his subordinates whistled in appreciation. Another voiced his sudden thought.

"Lord Rizevim, how was it we are supposed to get this being to fight Great Red again?"

He chuckled at his subordinate's foolishness.

"Do you know nothing of 666? While there is truly almost nothing know about this being. What is a fact however, is that it and Great Red fought a titanic battle within the gap. Ophis witnessed it and said that Great Red denied 666 from passing beyond the gap. We have the same plan, so certainly it will help us. Now silence while I work."

Rizevim had been trying to come up with a way to remove the seals but when he tried channeling devil energy into the holy seals nothing happened. So his backup plan would have to succeed or he would be pissed.

He flew away from the rock and his followers did as well. He then began chanting and channeled over half his magic into a huge attack. Pure magic concentrated into a massive sphere. He smirked and then unleashed the power upon the rock.

As the magic struck the rock and exploded a huge cloud of smoke billowed up and hung around the rock. With a flick of his wrist a gust of wind blew the smoke away to reveal the still intact rock underneath.

"Tch, what the fuck is with this rock?"

He muttered. His minions were silent. Not daring to laugh at his apparent failure. Then one raised his arm and pointed.

"Look my lord. There is a missing section."

Indeed a small hole existed in the rock where his attack had struck. About a dozen seals were damaged and several were gone. Most of the chains had overlapped one another where he aimed. They now floated aimlessly around the rock after snapping off. With a hole in the seals 666 should now be able to escape.

The group was silent and waited to see if anything would happen. After several minutes it appeared nothing was changing so Rizevim started summoning his energy for another attack. But as he did the rock started emitting a foreign power.

Just a small dose leaked through the hole, but the potency of that small bit of energy knocked everyone but Rizevim away. As if the first tendril of power had just been checking the rock's integrity a second probe of power shot out of the rock. But this did far more.

The rock exploded. Shards flying in every direction and a haze hung in the air. Everyone had covered their face's to protect themselves from debris. Rizevim was the first to look and see what exactly they had just unsealed.

[ToR]

Outside of this pocket dimension a tremendous shockwave blasted across the earth. An ear shattering boom echoed from a single point in the sky over Japan. Humans across the globe were frightened by the phenomenon as a solid wave of energized air pressure zoomed across the sky.

Behind heaven's gilded gates within their own dimension the power could be felt and every angel was put on edge. Those who remembered the brief feeling of that power from years ago felt a cold shiver go down their spine. A warning alarm was blaring in an empty chamber in a forgotten room.

Archangel Michael was suddenly swept into a torrent of millions of prayers for protection and help from the occurrence. The unexpected influx temporarily overwhelming him. As he regained his senses he grabbed his pain meds and downed a mouthful. He recognized that energy and was sure his budding headache was only going to grow.

In another parallel dimension, races such as the devils, fallen angels, and the numerous other mythical races were alerted to the foreign power. Its strength so powerful it struck at the gaps between this dimension cluster.

In Japan a teenage girl and her peerage recovered and ran outside of their club house to join the growing throng of people gazing skyward.

Within the real gap, a dimension that connected this cluster of dimensions to the greater universal dimension network Great Red stopped his twisting dive and gazed into the open air.

"So he has been freed. I wonder if that punk will come back for round two."

He decided to fly off to where Ophis was loitering around. He wanted to make sure she wouldn't interfere again. His huge bulk flew great looping spirals as he double timed it towards the infinity dragon.

[ToR]

Gazing into the sky the occult research club of Kuoh Academy had no clue what was going on. This club was comprised of the six present members and the one perpetually absent seventh. They were better known as the peerage of Rias Gremory. A noble high-class devil who had joint control of the city of Kuoh.

Each member besides Rias had been reincarnated as one of her devil servants. It was well within the social norm for her to treat them as servants, but she preferred thinking of them as her friends. Recently the group had managed to help her overcome an unwanted arranged marriage.

They had been relaxing afterschool in the clubroom and Rias had been enjoying the new found freedom no longer being engaged brought. She no longer had her fiancé Riser Phenex looming over her future happiness.

But the time for carefree enjoyment appeared to be over. A great disturbance had appeared over their city and the noise and pressure emitted had been particularly immense from being so close. Rias was currently looking for the other noble high class devil who she shared control of the city with.

Sona Sitri's slim figure caught her eye and she dashed her direction. Her peerage was hot on her heels and they could see Sona's peerage grouped up around their leader. The two groups acknowledged each other briefly before they returned to scanning their surroundings while their kings spoke.

"Sona, would you happen to know what that was?"

"Judging from the speed the pressure traveled and the extreme level the noise rose to. I would guess it was a shockwave from an ultimate level being doing something. But since we can't see them over head, I really have no idea."

Rias nodded her head.

"Yeah, do you feel that energy signature it feels really strange."

"Yes, it has an odd feeling to it, but it is very potent."

A short head of white hair bumped into Rias's elbow. Causing said girl to turn and look, prompting Sona to give her attention as well. It was Koneko, Rias's [Rook].

"Chakra."

"What was that Koneko? I couldn't hear you."

"Energy is chakra. Very strong."

"Oh chakra? Really how strange. I can't imagine what someone could have done with chakra to create this affect."

Koneko turned and returned to scanning the surroundings. Her [King] Rias trusted her sensor capabilities and Koneko was glad she hadn't second guessed her information. Her species of youkai was adept as chakra use and were natural sensors because of it.

"At any rate I think we need to contact someone. This disturbance would have been strong enough to be felt across the world and no doubt humans ha-"

"HOLY SHIT! LOOK!"

Sona was cut off by another member of Rias's peerage. Issei her one and only [Pawn] was a very exaggerative person, so no one was sure what he might be exclaiming about so loudly. But they all turned to looking.

"Oh dear."

Akeno, Rias's [Queen] said. Across the sky, several jets could be seen spinning out of control nose diving towards the city.

"Pres, we gotta do something. We are super strong and can fly right? We can totally save them."

Sona's peerage was murmuring among themselves and Rias turned to address her peerage.

"Well Issei we could. But that would be a lot of memories to modify. So I am not really sure what to do."

Before they could discuss any further a black hole appeared were the shockwave had originated and a figure stepped through. The same chakra pressure from before hammered down on the city. The force was overwhelming and the residents of the city were suffocating under this figure's presence.

Thankfully it disappeared and the figure could only barely be sensed by Koneko. The figure multiplied and five dark blurs streaked across the sky and caught each plane. Where they then lowered them to the ground safely.

Where the figure went to from there, no one was sure. But the two peerages were well aware that a being well above their level was within the city and they were already heading to a secure location to contact someone.

[ToR]

Earlier in the pocket dimension

When Rizevim looked toward the remains of the rock he saw a human figure floating in space. A large blue aura whipped violently around the figure before it seemed to reel it in and subdue the fiery blue energy.

Even from this distance he could see steam rising off the figure and gently dissipating in the air above. He watched as the figure stretched and then they spoke. In the dead silence of the void it was easy to listen in.

"Yawwwn! Aww man I am damn sore. That fucking old geezer thought that rock would hold me huh? Well listen up Naruto Uzumaki doesn't go down that easy! Ya hear me old man."

Naruto stretched again. He had really felt cramped inside that rock. Then he looked around and noticed a collection of humans in a group. They were flying with-

"Oi, are those fucking bat wings? Who do you guys think you are? Creepy bat wings are some Sasuke curse seal kinda shit."

"666, my name is Rizevim Livan Lucifer. I have released you from the sealing rock that the biblical god placed you in. I know before you were defeated you were trying to get past Great Red in the dimensional gap. This is also our plan. Will you work together with us?"

Rizevim completely ignored Naruto's comment about their wings and instead straight up asked for his assistance.

"Great Red? Was that the big ass dragon I was fighting earlier? And hey, where is that old bastard? I am gonna rip his beard off and make him watch as I burn it in front of him. HA HA HA!"

Rizevim stared at the figure of 666 or Naruto Uzumaki. As he for the figure was that of a young blonde man, had shouted upon breaking the rock apart. Before he could reply Naruto suddenly appeared nose to nose with him and spoke again.

"Oi are you listening to me? What is with the bats wings? And where is that old damn bastard? I am gonna kick his ass for putting me in that rock."

Rizevim jerked away from Naruto and flew back several feet. He got a good look at the man now. If he had to guess this Naruto looked to be 20 years old. He had short spiky blonde hair and light blue eyes. A set of whisker like marks decorated his cheeks.

Before he could take in anything else, he noticed the expression on this being's face. He could see the man start to curl his lip into a snarl. Before he could shout another round of questions Rizevim spoke up.

"Naruto. Your name is Naruto right?"

He got a fast nod of the head for confirmation.

"These wings are just our devil wings. Do you not know what devils are?"

It was a perplexing question to both sides. A being who fought the biblical god and Great Red surely knew what devils were. While for Naruto nothing really came to mind with regards to devils.

"Devils are like demons or something aren't they? You guys don't look like demons."

Rizevim's personal philosophy about devil behavior is that they should act like demons, but for the man in front of him he doubted he would care about his opinion on the matter.

"Devils are not demons. Many humans confuse us but we are different. But your other question, who is it you are speaking about? Who is this old bastard you are trying to find?"

Naruto was content finding out the men before him were not demons. He could sense they had no intent to attack him. The guy had been asking for his help earlier. Now he just wanted to find the old bastard to pay him back.

"He was a big glowing guy. Had a long white beard. Fast and strong as the Shinigami. He is one tough old bastard. The guy who put me in that rock. He should be around here he only put me in that rock like five minutes ago."

Rizevim had again scanned the blonde to get a better sense of him. He was shirtless and had the remains of some tattered black pants on. His feet were bare and his body had a fit appearance. He looked to be about five and a half feet tall. But he had no injuries and seemed to be in good health for having been sealed for several hundred years.

Naruto noticed the man's eyes dart to his attire and looked himself.

"Huh well what t' ya know. My clothes are missing."

Rizevim watched him touch a small black tattoo on his wrist before a puff of smoke covered him from sight. When it cleared Naruto was fully dress in a black shirt, covered by a black flack vest. His pants had been replaced with a new set of black ninja pants and his feet once more had a pair of open toed ninja sandals.

Currently he was wrapping white tape around his right sleeve while the left one was already tapped down. A small pouch was attached to his hip. Naruto glanced up at him and winked.

"Uhh, yeah anyway I am pretty sure the guy you are asking about is the biblical god. He fought and sealed you inside that rock over 300 years ago. Then he died after heading to fight in the war after sealing you. So yeah, he is dead."

Naruto cocked his head to the side and squinted his eyes at Rizevim. An unnoticeable flick of his fingers and a quick jolt of chakra had his tape roll resealed inside his wrist.

"So you are saying that guy I fought was a god? Just what kinda luck do I have? From one to a dragon to another."

When Naruto finished speaking to the guy with twelve bat wings, another conversation was started inside his head.

When he had slammed his chakra through the hole in the rock he wasn't the only one to wake back up. The nine tailed fox named Kurama had been locked away inside of Naruto since just after Naruto had been born. And Kurama desperately needed to hear the sound of another's voice.

He had been in a self-induced hibernation after they had been sealed for 50 years. With Naruto blasting his chakra out Kurama was woken up. He had not immediately started talking to Naruto but instead took the time to monitor their situation.

He had listened to the back and forth and decided to finally speak to Naruto.

"Oi! Naruto. Can you hear me?"

"Oh hey there Kurama. What do you think, has it really been 300 years?"

"Shit kid. I went to sleep after like 100 years or something so yes it has probably been that long."

"You mean you were awake when we got sealed into here? Fuck me if it's been over 300 years what's going on?"

"Alright here is what I know. When that dragon was about to beat us you ripped through to another dimension. You came out and head-butted that old guy. Who is apparently this biblical god. He was pissed so he attacked and overwhelmed your weakened state. Then he sealed you away in what I guess is a pocket dimension.

"You were ridiculously injured at that point but the god couldn't waste the energy required to kill you. It was less wasteful to seal you. So you were frozen in time basically. While I was not affected since I am sealed in a separate pocket dimension inside your body. I tried to heal you with our chakra but your body couldn't be affected.

"Luckily you couldn't die as you were essentially frozen in time. But I was able to rest and reclaim my chakra reserves. So I am at full strength. When you broke free I was able to easily repair the damage you had suffered and I am currently trying to stimulate your chakra to rejuvenate as well. But it is going to take away.

"So basically we need to get out of this dimension, get some food, and you need proper rest before you try to do anything else."

"Alright so your saying lets ditch this bat wing guy and go get some food and sleep?"

"You got it partner."

So this is a story that came to mind from that fact I've been reading some narutodxd's. I don't think it will take me long to write it all as I have it planned to be pretty short. I just need this distraction of another story right now.

Anyway I was browsing the dxd wiki and found out about 666(trihexa) so that is who naruto is suppose to be. As a disclaimer I don't know any dxd canon beyond the original dxd anime where it goes up to the kokabiel part. So the whole Rizevim guy is nearly a oc to me. I hope he doesn't seem like a totally different person.

If you have any issues with this story or see a plothole or something feel free to let me know. Otherwise feel free to leave a review on the story or write me a pm with and questions or comments.