Dining Hall, Gremory Castle, Gremory Territory:

Underworld, Hell:

The Next Day, Morning:

Isaiah's POV:

"Since there were a few…huge reveals last night, I couldn't introduce anyone, so I'll just do that now. As everyone know, this is Kuroka Azathoth, adopted into House Azathoth and the Queen of my peerage."

"It's a pleasure to formally meet everyone." Kuroka said with a smile and a bow, now dressed in a black blouse and a crimson skirt with black low-heeled shoes, forgoing her usual revealing kimono.

"Next is Valerie Tepes, wielder of the Longinus Sephiroth Graal, daughter of King Vlad Tepes IV and my Bishop of two, one of which mutated."

"Hello." Valerie said, wearing a white sundress as she had a small smile on her face while she held a blushing Gasper in a death-hug.

"Then, this is Samson, inheritor of the soul of Samson of Israel & my Rook of two."

"It's a pleasure to meet you all." Samson said without his loud & boisterous voice, smiling as he bowed his head.

"And finally, Bardou, my Knight."

"The Hellhound of Azathoth is here!" Bardou barked, to which I just smiled before turning to our shocked audience.

"We also have Issei Hyoudou, the wielder of the Longinus Boosted Gear and my pawn of 6, Saji Genshirou, the wielder of all four Vritra-type Sacred Gears, three of which I stole from Grigori operatives, and my pawn of 2, and Meredith Ordinton, the wielder of the Sacred Gear Alphecca Tyrant, a former magician of the Golden Dawn and my mutated Knight Piece, but the first two are still in school in Kuoh and the last is on a mission in London, but she should return in about three months or so." I said and silence reigned in the atmosphere before Okita spoke.

"How the hell are you so damn lucky, gaki?" I just shrugged as Sirzechs and Zeoticus chuckled.

"Wait, what was that about stealing Sacred Gears from Grigori agents?" Venelana asked with a frown, to which I smiled.

"They attacked me first and were trying to kill me for an unknown reason. I was within my legal right to defend myself and since they possessed the three Sacred Gears I was looking for, I decided to take them and make sure that any threat to myself or anyone close to me is removed." I said, to which she sighed with a smile.

"I taught you well." I chuckled at her words before Okita spoke.

"Gaki, you and me, spar right now."

"You really missed your punching bag, huh?" I said, to which he grinned as everyone shook their heads.

"Fine, but I'll warn you once. Go all out or you're not going to be able to keep up." He just snorted at my words as I smiled and we teleported in a flash of crimson to a familiar place, everyone else appearing in one large teleportation crest just a second later thanks to Kuroka as I looked around.

"Don't you bring back memories?" I muttered as I stared at the large oak tree with a sad smile, seeing a familiar sight of four figures just resting before one of the figures disappeared and I sighed. Turning back to Okita, he gave me a concerned stare, to which I just shook my head.

"I'm fine. Just…memories." I muttered and he sighed as he nodded, taking out a katana before his Touki exploded off of him, cracking the ground under him as he cracked his neck. I just put my hands in my pockets with a smirk as I waited for him to begin.

"You're not getting ready?" He asked, to which I just smiled.

"No need. After all…you're weak." I heard some of our crowd gasp slightly at my words and his eyes widened slightly before they narrowed, a flash of anger in his eyes as he grinned.

"Looks like I need to show you the pecking order again." He said before he disappeared, reappearing at my side as his katana sliced through the air towards my neck. I just smiled as I leaned under it, spinning around his rising knee as well as sliding under his follow-up hook kick before I jumped.

My leg arched through the air and Okita barely got up a guard before it connected, sending him flying backwards across the lake and indenting his body into a tree on the other side as I rolled my neck.

With a grin, I was gone, the lake parting behind me as I appeared in front of Okita as my fist flashed forward. In the blink of an eye, he was gone, grinning as he had both of his swords unsheathed. I ducked just in time as his katanas sliced the air above me, trees tumbling to the ground besides us as his shock waves sliced right through their trunks.

A leg sweep made him jump only for me to follow after him, my fist flashing upwards in an upper-cut and sending him flying even further into the air as I unveiled my Devil wings and flew after him.

Sparks flew and sonic booms echoed throughout the sky as we kept accelerating, shock waves warping space and cutting deep through the clouds and the ground as my fists and his blades clashed over and over.

The next second, both of us were on the ground, grinning widely as we stared at each other. Blood slowly dripped from the cuts on my knuckles that were healing slowly and his arms trembled as he felt the aftershock of my blows.

"Fucking hell. What kind of training did you do after we left you?" He asked, to which I smirked.

"Life-and-death spars with Buddha and Wukong on a daily basis, though it was mostly them trying to kill me and me trying to keep up." I shrugged, to which he chuckled as he sheathed his blades.

"Yeah, I feel that I'm going to be the one hurting if this continues, so I'm done." I just smirked as I nodded, my wounds now fully healed as we walked towards the shocked crowd.

"You've grown really strong, huh?" Rias said with a smile, hints of sadness seeping through as I just grinned and patted her on the head.

"Like I told you when I began my training, I'm the muscle. You're the brains. Unless someone can beat me, you won't have to worry about having to fight anyone. Just train to be the strongest version of Rias you can be." She giggled as she nodded and I smirked before I grinned.

"So, how about that breakfast? I've been missing Evelina's cooking and I'm starving." I asked, to which they all just chuckled as Grayfia created a teleportation crest under everyone before we went back to the dining room.

A Week Later:

Gremory Castle, Gremory Territory:

"Rival!" I heard an excited shout and I sighed as I jumped to my feet before leaping backwards, the ground in front of me exploding as a dust cloud rose before it was extinguished as Sairaorg gave me a happy smile. He was taller than me and far more muscular too, his shirt straining to contain his upper body as his violet eyes shimmered with mania.

"Hello, Sairaorg." I said, to which he just chuckled as he wrapped me in a tight bearhug. I could feel a few bones crack and I wheezed as I tapped him on the back, to which he just put me down on the ground with a sheepish chuckle as I chuckled.

"Good to see you too, Regulus." I said with a nod, the orange-haired teen walking up behind Sairaorg looking slightly surprised as I smiled.

"Your aura gave it away, even if you suppress most of it." I said, to which he shrugged as I turned back to the grinning Sairaorg.

"No. We're not fighting."

"You're no fun anymore." He grumbled, to which I rolled my eyes as Regulus gave an amused smirk.

"So…why are you here?" I asked, to which he shrugged as he sat down on the ground.

"I heard you were back, so I came to visit. I was going to become earlier, but the bastard decided to accelerate my heir lessons. That and the fact that he seems to be much more stressed earlier today because of a meeting the Four Satans called. You know anything about that?" He asked and I grinned.

"Yeah and I can't tell anyone, so you'll have to wait like everyone else."

"Oh come on~ You can tell me~" I just rolled my eyes as I walked back to the castle, Sairaorg continuing with his whining as Regulus followed after us with a smirk.

"King!" I heard a shout and turned to see Samson running towards us, grinning widely as he dragged a number of boulders behind him.

"Hey, Samson. Bye, Samson." I said as he nodded and ran past us, Sairaorg looking at him before turning to me.

"That's my Rook, Samson. A battle-maniac just like you and no, you can't fight him. He doesn't know how to hold back and neither do you, so come along."

"…Since when did you become Okita?" He muttered and I rolled my eyes as we walked towards the castle, Regulus walking after us.

"…So, are you signing up for the Reincarnated Devils Ranking Tournament in two months' time?" Sairaorg asked a few moments later, to which I frowned in confusion.

"What's that?" I vaguely remember Sirzechs telling me about it, but that was probably years ago.

"It's a tournament held once a decade in celebration of Lord Ajuka creating the Evil Pieces. Only reincarnated devils officially ranked as High-Class or Pure Blood Devils officially ranked as Low or Middle Class are allowed to enter it. The winner is granted any wish by the Four Satans, so if you want, you can go from a Low-Class devil to a High-Class devil by just winning." He explained, to which I hummed with a grin.

"Any wish, huh?" I asked, to which Sairaorg chuckled as he nodded.

"Any wish that isn't outrageous or not within their power." I nodded before I turned to him.

"So, how powerful are the contenders?" I asked, to which he shrugged.

"Most are Peak High-Class, with a few being in the Ultimate-Class range and a rare few being Satan-Class."

"In other words, if I compete, it will be a landslide win." I muttered, to which Sairaorg just snickered as he nodded.

"At least, you'll get a wish." He snorted and I grinned as a wish came to mind.

"You know, sometimes I forget there's a brain inside that empty head of yours."

"Oh, fuck off." He said and I smiled.

I really missed this.

Gremory Castle, Gremory Territory:

Later that day, Evening:

"And once again, a toast to the return of the prodigy of House Gremory, Isaiah!"

"To Isaiah!" The crowd of pure-blood echoed with Zeoticus, with me standing next to him with a perfect cordial smile as I let out a soft sigh.

"You can go to the girls now." Zeoticus muttered as he patted me on the back with a chuckle and I nodded before walking to the table where everyone was waiting, sitting down in the chair next to Akeno with a sigh.

"Why is it that every time I'm here, there's either someone who wants to fight me or a party held in my honour?" I muttered, to which Rias shrugged.

"You are the most famous reincarnated devil currently and in history. Tales of your glory will be told for millennia as your children and your children's children shall be held up to your standards!" Samson exclaimed, drawing glances from the pure blood devils as Rias and the others just giggled at his words.

"Samson?"

"Yes, Lord Isaiah?"

"Inside voice."

"Ah, right. Forgive me." He said with a sheepish smile and I smiled as I nodded.

"Isaiah Azathoth. It's been years since I've seen your youthful face amongst the masses in these parties." A deep voice said behind me and I heard gasps as I turned around, my eyes widening as I saw Zekram Bael smirking at me.

"Great Lord Bael." I said as I stood up, falling to a knee as Zekram chuckled and patted me on the shoulder.

"Lord Zekram is fine. Now, stand up. A young man of your calibre has no reason to be on his knees or do you?" He asked with a raised eyebrow, his True Voice echoing throughout the hall as those around us winced.

"It's better to be respectful to the right people, my lord." I answered back, the sound of my True Voice shocking the devils around me as Zekram just smirked before he chuckled.

"Yes, I should have known that the next Super Devil would not take long to unlock his True Voice. Now then, I assume my descendant has told you about the Reincarnated Devils Ranking Tournament as I ordered?" He asked and I smirked as I nodded, catching the sight of Sairaorg with a sheepish grin, which I smiled at.

"I figured that's the reason he brought it up as Sairaorg knows that I don't like to bother with those weaker than I am." Zekram just nodded at my words before he smirked.

"How about a bet between you and I?"

"I'm listening." I answered and he smiled.

"Why don't you take part in it? If you lose, you leave House Gremory and become my personal servant." He said, shocking the devils listening, Sairaorg and the rest of the young Devils. I caught Sirzechs, Venelana & Zeoticus frowning as they heard that.

"And if I win?" I asked, to which he chuckled.

"I, Zekram Bael, swear on my name that I will promote you and House Azathoth to the Ultimate Class Prince Rank, Lord Gremory and his house to Ultimate Class Archduke Rank as well as owe you a personal favour on top of the one you earn from the Four Satans." He declared, shocking the entire hall into silence as my eyes widened slightly before I quickly fixed it back into a stoic look, though not as fast as I thought as he gave me an amused look

"That…is a very tantalizing offer, Lord Zekram, but I must ask one question. Why?"

"I beg your pardon?"

"Why me? Why not Sairaorg or Riser Phenex or Diodora Astaroth? Why do you make such a powerful offer to a reincarnated Devil? What benefits does this offer bring you?" He smirked at my questions before chuckling.

"I see Venelana's taught you well. In that case, let me answer your questions in that order. Making the offer to them would bring me nothing as they could achieve that rank in a few centuries thanks to their blood. I'm making the offer to you because of the fact that you are just a reincarnated Devil and yet, you're already stronger than 90% of the idiots in this room. Finally, call it a hunch of me putting all my chips on the future of Devilkind and investing in the younger generation." He said, drawing frowns from those listening in, though they did not try to correct him as I stared at him before I grinned.

"I, Isaiah Azathoth, accept the bet offered by the Great Lord Zekram Bael." I chanted, holding out my right hand and Zekram smirked in amusement as he grasped my hand in a tight grip, a purple chain wrapping around our hands.

"And I, Zekram Bael, accept the terms of the bet." The chain around our hands flashed three times before shattering into purple motes of light, Zekram giving a final nod before disappearing into the crowd as I sighed.

"What…just happened?" Sona was the one to break the silence and I shook my head as I sat back down.

"Let's just continue with the party and let me worry about it tomorrow." I muttered, to which they all frowned but nodded as I took a wine glass and downed it in one gulp.

Maybe being reincarnated into this world wasn't such a good idea after all.

A/N: And now, we're finally starting the next arc. The Tournament & Rating Game Arc. The tournament is self-explanatory.

The Rating Game part…well, you all will have to wait and see for that.

Anyway, how do you guys like Isaiah's power boost? Don't worry. I will write the unfortunate demise of Joker.

Now then, read, enjoy, review and I'll see you guys in the next one.

Until then… Ba-Bye~!