Training Part 12 of 14 - Deafening

I'm actually going to introduce the 2nd OC, who WILL be in Issei's harem, let's just say a lot sooner than Chapter 77 which is what I had originally planned. The Devil Is A Part Timer cast won't come into play until Chapter 35. Whatever Chapter I said I would introduce them in before was just an estimation, but now I have all the arcs planned out. It's just a matter of figuring out the exact details.

Underworld

Sirzechs sighed after Issei left. He was glad the kid didn't see the bags under his eyes. Unfortunately for him, Serafall did, and she was not pleased with him pretending everything is alright.

The Leviathan gave him a hard stare. "Alright, what's up Sirzechs?"

He looked at her, feigning confusion. "Huh? What do you mean?"

"Don't play dumb with me! Something is clearly bugging you. I can't tell if you're depressed or something due to that deep sigh, but I see how tired you seem."

Grayfia directed her attention between them as they spoke. "Looks like the cat is out of the bag?"

"Gray-chan? Do you know what's going on?"

She nodded. "You see, my idiotic husband here thought it would be best to hide the fact that, for a little over two weeks now, even before the incident at Rias' school, he's been having terrible nightmares, visions to be exact."

Serafall stood up to talk face-to-face to both of them. "What kind of visions? And what does the Kuoh Incident have to do with any of this?"

"... You remember how that machine, VEGA, and Gabriel said that her brother might be back? The attack on Kuoh was done by him. We already have enough evidence to say so: the pentagram drawn right before the Kuoh Incident, for example. There's also those Demons that emerged from the portal, and although they look extremely different from the very few we have seen in our lives, there is no doubt that they're the same and have only evolved. He's been giving premonitions to Sirzechs of something, a terrible future in which most of us die for some reason."

Sirzechs narrowed his eyes. "Yes. In the dreams, I saw the other three Satans brutally murdered. It got worse and worse to the point where I saw my parents die right before my eyes as well as Rias and Grayfia, all murdered by Him. But... What scares me the most is that I have a funny feeling that I am somehow indirectly responsible for their deaths."

Serafall crossed her arms. "Did He say anything? Anything at all that can give us clues as to why he would torture you like this?"

He shook his head while sighing. "No. However, there is one thing he said that I cannot remember. All I remember is him saying that those visions are exactly what will happen if I don't follow his instructions, like he wants me to do his bidding or something."

"What exactly did he say?"

Sirzechs shuddered. "He said that he has specific instructions for me to follow. I just can't for the life of me remember what he said next."

The Leviathan was thoroughly alarmed.

Issei's Dragons:

('Ddraig speaking telepathically')

("Ddraig talking out loud")

|'Vritra speaking telepathically'|

|"Vritra talking out loud"|

Other Dragons:

['Albion speaking telepathically']

["Albion talking out loud"]

{'Bahamut speaking telepathically'}

'A character's thoughts'

Chapter 25: Training Part 12 of 14 - Deafening

Days 61-88 Training Days

Asgard

Great Red and Ophis had already teleported the group's stuff back to their rooms in the royal castle and picked them up.

Before leaving, the DOOM Slayer dropped a crate that VEGA made containing a thousand vials of Phoenix Tears each into their pocket dimensions. Arisu had them placed in a separate pocket dimension from the one containing her cats.

"Today," Great Red spoke, "both Ophis and I will be training you. Physically speaking, you will have it easier, but we're still going to require you to combine your physical capabilities with your magical ones as we will be training your magic."

Ophis looked at Issei blankly. "... I, sense Vritra."

|"Hello Ophis and Great Red. It's Vritra. I have chosen Issei as my new host."|

"... Why?"

|"My previous host was far too weak to be of any use to me."|

"... I see. Now Issei and Vali, I want you two to activate your Diabolos forms."

Vali and Issei nodded.

"DIABOLOS DRAGON LUCIFER!"

"DIABOLOS DRAGON GOD!"

All of Issei's green gems on the Boosted Gear turned red instead of their usual color.

Great Red smirked. "While you both were asleep in the Dimensional Gap, I put small bits of my power in you as well, turning Issei's gems red in this form only. It's still green in your other forms. You both should now be able to transform your wings so that they can release powerful magical attacks and auras automatically."

Vali's eight wings turned a bright pearlescent blue.

Issei's ten wings turned fiery red.

Suddenly, both of their wings released a massive energy burst that kicked up some dust, making the other nine girls dig their feet to stay upright.

"What just happened?!" Mira screamed from the stands, shielding her eyes to protect herself from debris.

Great Red cackled. "Everything is alright. Their wings gathered all the mana, gas, wind, and light in the air before releasing them into a repulsive wave, and that wasn't even the most powerful blast that could happen considering they weren't flaring all of their auras. The two of them just need to get the hang of this form to focus this power on specific targets, that being Ophis and I. You are able to use your Longinus Smasher in this form as it has been upgraded from its Juggernaut Drive version, but it is not enough because you have not mastered control over it; its power is almost too much for you as you are now. We will do something to fix that."

The Apocalypse Dragon teleported them to a much more wide open area than the soccer stadium, a massive flat landscape of nothing but small blades of grass, and transformed into his Dragon form with Ophis standing next to him, both at a distance of a kilometer from the trainees.

"Now, I am going to be standing in one spot at the far end of this arena in my Dragon form, and I will be attacking you with my version of the Longinus Smasher while Ophis will put small bits of her power into my attack. Issei, it is your job to use Vritra's Absorption Lines on my attacks to give power to yourself and your teammates. This will permanently increase all of your magical capabilities and mana capacity as it will be the same thing as these girls receiving my and Ophis' power on a much smaller scale than what Ophis put Issei and Vali through, and you will be able to keep it. Issei, while you are absorbing it, keep boosting enough until you feel like you are either at your limit or you can shoot it back to me using Longinus Smasher to break through a barrier that Ophis will set up when you do. Same goes for you, Vali, as you will be dividing and also using your Longinus Smasher. Make sure that both of you are using Ophis' power that she gave you to strengthen your magic as well as Senjutsu and Holy Lightning all at once. In order to pass our training, you must all lay one direct hit on me and Ophis within the next 27 days. I'll give you a minute to strategize starting now."

Issei nodded and turned to the other ten. "Here's what we are going to do. Tsubasa, Ravel and Murayama will create and enforce their strongest magic barrier and ice dome behind us so that we do not go flying. I think Great Red is probably going to either shoot over us or hit the ground in front of us. Akeno, Kuroka, Irina, Rossweisse, Arisu, Vali, Raynare, and I will charge up our strongest Senjutsu and Holy Lightning attacks and will wait for the right moment to unleash when I say so. Ravel, you have been learning Holy Fire, right? Do you think you will be able to charge it up while enforcing the barrier?"

Ravel nodded. "Yes. Doing two different magical techniques at the same time is an easy feat."

He nodded and turned to Great Red as his teammates set up their battle formation. "We are ready."

"Heh. Good. Apocalyptic Trumpet!" Great Red roared as he opened his mouth which fired out a large beam while Ophis transferred small amounts of her power into the beam.

|"ABSORPTION LINE!"|

The blue line of magic latched onto the outside edge of the continuous beam firing at the group. Issei immediately felt his mana capacity and magic power sky rocket. The line split into ten smaller ones that touched his teammates, who all subsequently experienced the same feeling.

The barrier and ice wall were cracking and about to break until the Absorption Line transferred power to Tsubasa, Ravel, and Murayama. Seeing the barrier now holding steady, Ravel began charging up her Holy Fire as Issei and Vali boosted and divided.

The individual power all eleven of them are capable of flowed through them, almost overwhelming them. Issei suddenly gained the ability to use Holy Fire as well as all of Kuroka's Senjutsu techniques. The others gasped as the Ouroboros entered their bodies, not feeling any pain at all unlike the two Heavenly Dragons.

After several minutes, Issei shouted, "Fire now! REFLECT!"

The attack, also combined with Senjutsu and strengthened by Ddraig, Vritra, Albion, Great Red, and the other ten trainees, combined into one beam and blazed to the two Dragon Gods. At the last second, Ophis erected a barrier, and the attack collided with it, an earsplitting boom echoing for dozens of miles due to the resulting explosion. Humans would lose their hearing at such volumes, but supernatural creatures would not even be damaged by the sound. A large cloud of smoke covered their target.

Arisu blinked. "Did we get 'em?"

Whoosh!

The sound of a pair of wings flapping could be heard as the smoke was blown away to reveal Great Red and Ophis unfazed.

"What kind of spell was that, Issei?"

"Reflect? It allows me to send any magical attack coming my way back in the exact direction it came from but combined with any magic I wish to use. I was considering calling it Longinus Apocalyptic Black Blaze Holy Fire Lightning Ulysses Trumpet Smasher, but..."

Great Red cackled as he and Ophis teleported to them in their Human forms. "I'll give you all a few minutes to recover before you do it again."

"... Uncle Red?"

"Yeah?"

"Are there any beings in the universe you fear?"

He nodded. "Only one, that being my best friend Bahamut. Not even you, your peerage, Vali, Ophis, all the gods, and I combined could lay a scratch on him in a spar, much less a fight to the death."

Vali grinned and chuckled amusedly. "Haha! Now that only makes me want to fight him even more."

"Battle maniac," Irina deadpanned.

Issei tilted his head. "Not even if Vali and I divided and boosted enough times?"

Ophis nodded. "... If that happened, we would be close to beating him, but it still wouldn't be enough."

. . . . . . .

Time went on. It wasn't until the final day that the group was able to break through Ophis' barrier and hit the two Dragons, which was barely enough to scratch them, but they were happy to see the tremendous growth among the trainees.

One thing happened though. Everywhere in the universe, powerful magically-sensitive beings of all sorts felt the exponential explosive increase in their power, particularly the Sekiryuutei, and some of the Khaos Brigade were now very concerned. The less concerned ones such as Baldur, Atlas, and Uranus didn't feel it, but Satan and his Generals, Thanos, Shiva, Odin, Thor, Freya, Loki, Gabriel, Raphael, Dulio, Grayfia, Sirzechs, Serafall, and Azazel all did.

The Grigori

Azazel was doing research in his lab when he felt the power. He stood up abruptly. "Wow! I didn't know you had it in you, Issei. You have just become even more curious to me." He scratched his beard.

Mount Kailash

Shiva was sitting on the summit of the mountain and meditating when the burst of energy made its presence known. His eyes shot open, and a very small smirk made its way onto his face.

"Hoh? Interesting."

The Underworld

Sirzechs was about to reply to Serafall when it hit them. Their legs shook as they struggled to stand.

"What was that?!" Serafall shouted. "Is my So-tan in danger?!"

Sirzechs smirked while holding his head, feeling dizzy. "Ease up on the sis-con tendencies, Sera. Sona is fine."

"Like you're one to talk!"

"Was one to talk. Was." He corrected.

Grayfia's eyes widened a bit. "No need to panic. It seems the Sekiryuutei has become far more powerful than we could possibly imagine."

Serafall's legs gave out under her as she fell onto her knees, looking up at Grayfia in shock. "I-Issei did?! That... That's unbelievable, and yet..."

Takamagahara

"Mhhh... So delicious!" Amaterasu lightly squealed as she ate a chocolate muffin.

Izanagi sighed at his daughter's behavior. "Ama, if you keep eating so many sweets, you'll get fat."

"Nonsense," Tsukuyomi scoffed, waving his hand. "All that weight is going to go straight to her chest."

"How rude!" Amaterasu exclaimed incredulously, chocolate smeared on her lips, pouting cutely, making the other two Shinto Kami sigh at her childish behavior.

Tsukuyomi was taking a sip of water right as the explosion of power reverberated throughout their beings, making him choke and cough.

Izanagi was about to light up a dube. The unlit cigarette fell from his mouth as his body quivered in fear. "W-What the hell?!"

Amaterasu moaned as she became wet in certain areas, but her father and little brother ignored her.

Sixth Heaven

Gabriel gasped while she was in the middle of a meeting with the other Great Seraphs. She clutched her chest.

"Sis, what is it?! What's wrong?!" Michael was concerned.

"Oh dear... It seems my future son-in-law doesn't stop training... Ahhhhh!" She moaned, rubbing her thighs together, her wings flickering between black and white.

Raphael shook her shoulders. "Gabby, get a hold of yourself! You're about to fall due to your impure thoughts!"

Dulio smiled nervously. "Heaven's System, play Sweet Home Alabama." The music started blaring throughout all of Sixth Heaven.

Raphael glared at him. "Now is not the time to be making jokes!"

The newest Seraph held up his hands. "Sorry, I was just trying to ease the tension... Sexual tension, that is."

Michael didn't feel it, simply remaining confused.

Asgard

The wine in Odin's glass shook like ocean tidal waves.

He chuckled. "So it seems the Sekiryuutei and his friends are finally about to reach their potential, after all."

Thor nodded. "Indeed."

Freya held a hand up to her chest. "Oh my. I knew he would be powerful, but this? We're lucky he's on our side."

Odin suddenly began coughing. "C-Crap! This aura isn't good for my physical health!"

"Father?!"

"I..." Odin wheezed. "I think I'm having a heart attack. Gah!" He placed the cup of wine down on the night stand next to him before he fell off the bed.

"Father! FATHER!"

"Dear, stay with us!"

"Somebody get a doctor!"

The son and the mother carried the Norse leader out of the room. Odin fell unconscious, and Freya and Thor were too worried to notice Loki and Baldur slipping out of the shadows.

Loki looked at the younger brother. "Now is our chance. Follow me."

They both hastily moved the beds out of the way, opened the door to the vault, and saw what was inside. There, at the end of a long hallway that contains many assortments of valuable items, and encased in a glass cube surrounded by a barrier, sat the Eye of Agamotto.

"There it is!" Loki whisper-shouted.

The two gods exchanged smiles with each other as they rushed over to it, destroyed the magical barrier, threw the glass covering away, and grabbed the item.

"This is it?" Baldur asked, wanting to be sure.

"This is it, brother."

"Heh. Good. At least we're finally done with this mission."

"Agreed. Now let's leave before anyone catches us."

They teleported away.

Titan

Thanos frowned. "Did you feel that?"

Satan stood up and began pacing around.

"Yes, I did."

A random male Fallen Angel shouted to another. "See this look?! It's terror!"

"Fallen Angel, did I give you permission to bitch?!" Satan growled. (72)

A magic circle appeared, and from it emerged Loki and Baldur.

Thanos was happy to see these two since he thought they failed, and now he can finally take out his frustration of their failure and his oversight of the Sekiryuutei's potential on them. He had all sorts of terrible methods of torture planned for them, wanting to break them. That was until he saw them kneel and hold out something for him, surprising him.

"All mighty Thanos," Loki stated. "We present to you... the Eye of Agamotto."

The Mad Titan grabbed it and held it in his palm, examining it. 'Huh. And here I thought they failed.' He looked at the two. "What took you so long?"

"The vault was well-guarded, but the All Father seems to have suffered a heart attack. We took that to our advantage and immediately rushed in to grab it. They will know that it is gone when they see the mess we left behind, so we will be staying here with you if you don't mind."

Baldur cleared his throat. "My lord, if you don't mind me asking, you said the Eye of Agamotto contains the Mind Stone?"

Thanos smirked. "Ah yes. I shall now show it to you. Look here as you witness the true power of a Titan!"

He grabbed the lockett in both hands and proceeded to yank it into two separate piece, catching the middle part while throwing the destroyed outer layer away. Then, he pried open the golden metallic orb in the middle to reveal a glowing yellow stone which floated into the air. Grabbing it, he examined it with satisfaction as he slowly moved the stone until it snapped as if attracted to the gauntlet and placed itself onto the opposite side of the center of his palm behind the Space Stone and the other four vacant slots.

"Two down, four to go." A sinister smile made its way onto Thanos' face.

To Be Continued

No, I am not killing Odin off.

References:

(72) Halo 2

Issei's Harem From Peerage (same as peerage members, most to least powerful):

Issei Hyoudou (Mutated King)

Arisu Yamauchi (OC, Six Mutated Pawn Pieces)

Raynare (Main Girl, Queen)

Akeno Himejima (Knight)

Kuroka Toujou (Bishop)

Irina Shidou (Rook)

Rossweisse (Rook)

Ravel Phenex (Bishop)

Natsuki Murayama (Two Pawns)

Tsubasa Yura (Knight)

Non-Peerage Harem Girls:

OC yet to be introduced

Sona Sitri

Mira