Issei tried to feel the power that God of the bible had given him. He was smart enough for to figure it out on his own. Still, it was infuriating that he left without fully explaining everything.
He was suspicious about his Grand plan and didn't fully trust him. Issei isn't a fool to quickly trust someone just because they helped him without any hidden intention. He wasn't sure if this plan would affect him negatively but Issei didn't take the chances and stay vigilant.
The most striking thing is his last words about being a child of something. Issei couldn't comprehend what it was but he knew it was important.
However, he dismissed it since the god of the bible was powerful enough to send him through time. Issei knew currently it would be stupid to think he could fight him or even hide from his clairvoyance. Putting it to the side for now, Issei felt source of energy entering his body and within his mindscape saw three burning fire.
One was red crimson flame burning endlessly showing dominance from his presents while the other is a white flame shining brightly blinding any human and finally a dark miasmic flame with red mix into it.
'Seeing this I could guess this are my Divine, Devil and Dragon energy. Let me see…'
[A/N: I made it into divine than holy since it sounded better. ]
Issei focus his attention to the divine flame causing overwhelming tranquility that was too much him to handle but he persist, gritting his teeth and controlling the amount he needed.
It took him half an hour to finish faster than he expected then behind his back appeared a multitude of feathered wings. Issei surprise to see the wings but calm down half expecting it to be.
"Oh did that guy gave you his blessing turning you into angel, devil hybrid, Aniki?"
Normally it was not possible for devil and angel to mix together as their bloodline is like oil with water never truly fusing together. However, the God of the bible rewrote his own rule making sure to make Issei all of them.
Issei potential is boundless that only time will tell for how far he'll get stronger. He observes the thirteen wings behind him feeling the strange sensation of the divine energy coursing through his body.
"Yeah I guess. He gave me the real Maou bloodline it gave me power from all of the devil pillar but big G told me it depends on my progress."
"Hahaha as expected of Aniki! You are growing stronger and stronger!"
"Thanks, I'll be the strongest then exterminate all those outer gods."
[I was asleep for just a moment but things seem to gotten interesting.]
"Oi Irene finally decide to join in."
[Hahaha don't blame me I was too mad seeing the devils but moving on, I didn't expect Great red to be here.]
"Ain't this interesting. How are you, Irene-chan."
[I've been great until you show up.]
"You make it sound like you don't want to see me?"
[Cause I do.]
"Ouch."
" Stop it you two!"
Issei shouted silencing the two while the sound of Ophis eating was the only thing could be heard. The two dragon fiercely looked each other trying to fight them silently.
"Now that you two stopped acting like children, do you know anything I should train this powers?"
[Hmm the best for now is train both your devil and dragon while the angel side is until you meet up with that stupid crow.]
"Wait are you mad?? Don't tell me you heard about great red being in my harem?"
[No, I am NOT.]
Issei knew it was lie since she was only person he had spend countless years together and could instantly know if something was wrong.
"Your obviously lying. Please don't be mad Irene-chan, I promise once I get your new body I'll do my best to knock you up!"
[Hmm I'll let it slide but I want girl!]
Issei chuckled hearing the quick change of behavior. Among all of his lovers, Irene was the who wanted to have children the most. They didn't had the opportunity due the outer gods attack.
They still can't have children since currently It was dangerous to raise one when fighting a near undefeatable monster.
"Alright! Aniki, why don't we start our spar?"
"Let see if I can go balance breaker since now I have control over the sacred system."
[Interesting. I wonder if you can create sacred gears.]
"I'll talk to Azazel about this since his much knowledgeable about it but if I can create sacred gear then it give me more advantage in fighting them."
Issei formulate with many sacred gear that he would create new powerful sacred gear with the flesh of the outer gods. It would give him better advantages since their own weakness is their kin. He had form an alliance with one of the outer god.
'I wonder where is that 'thing' is cause I doubt that thing die…..'
"If I can I'll replicate the sacred system and make my own. This way I'm the only one and the people I allow gain them."
[That would be the best. I can already see that you are thinking of using the outer god flesh as sacred gear.]
"Yes, however I'm sure if it would work until we try."
"How creating one with me, aniki?"
Great red suggested making Issei to consider her offer. A normal sacred gear would need a powerful creature to occupy the sacred gear but in the future Azazel was able to create a carbon copy of sacred gear system with added figure of not needing a soul to occupy it and only a fragment of it.
Issei had little knowledge about the sacred system since he had read Azazel's research. This meant Issei doesn't need Azazel help but it was better to have someone helping him than doing it his own. Furthermore, Issei lack the influences and resources to create a sacred gear.
"I'll take that into consideration for now, let's begin our spar."
"Great! Show me your best shot aniki!"
Issei folded his angel wings and focus his attention to his Dragonic energy gradually felt the familiar feeling afterwards his body radiates power comparable an ultimate class devil.
[BOOST! BOOST! BOOST! BOOST!]
His power was multiple every moment however it was not enough to even faze the strongest creature in his current world.
[BOOST! WELSH DRAGON BALANCE BREAKER!]
Issei quickly enveloped himself in crimson red armor appearing into his complete scale mail armor. He felt the balance breaker could last longer and doesn't have feeling of discomfort.
"Not bad, Aniki! Your power is comparable to an ultimate class or even Satan-class."
Issei currently couldn't reach Diabolos Dragon emperor since his body wouldn't be able to handle the power. None the less it wouldn't take him much longer to reach that level.
"Alright let's fight spar!"
In an instant Issei appeared in front of Great red who only use her palm to block his attack but he anticipated it use dividing power to absorb her power. They perform a series of jabs and kicks with Issei being more knowledgeable.
Issei didn't only have his boosted gear but also the divine divider from vali. Great red didn't even flinch from the barrage of Issei attack taking them as if it was nothing.
"Dragon shot!!"
He distance himself then use his demonic boosting it afterwards blasted Great red. Ophis teleported far enough as it cause a powerful explosion enough to wiped out Issei hometown.
"That was interesting Aniki. Now its my turn."
Great red only had small scratch from the blast as she grinned then dash forwards to attack Issei who barely evade her assault. He was struggling to keep up resulted in being launch through the air like rag doll.
Issei balance himself then tried to fight back. Great red lowered her strength enough for Issei to not die from her immense strength.
From their fight, Issei could feel he was regaining his old power and was gradually getting use to his power. After a few hours of training Issei was able to reach peak ultimate class and high class as his base power without considering his combat skills and boosted gear.
"That's enough, Aniki. You need to rest."
"Ah got carried away. Thank you, Red."
"Issei are going home? Can I come with you?"
"Of course you can but can you something else. How about you red? Are you coming with me?"
"Sure, Its boring as hell in the dimensional gap. Being with you makes things exciting."
Issei nodded as they open a portal back to the human world. He wasn't afraid if the Qlipthoth to attack him since they won't take chance to expose themselves without careful planning.
As for how he would explain with his parent then he'll just b*ullshit his way out of that situation.