(A/N: One comment said about how unrealistic this is and how DxD isn't this strong. Well, to all of you who do think the same, this is a fanfiction and there are far many other fanfics where the rules have been changed, new Gods has been created and the levels have increased, I'm not the first one and I'm not going to be the last.
This is how I choose to write it and I think that while Ishibumi wanted to create a more stable franchise, he ended up making them look quite weak compared to many others. Besides, DxD seems to be the only world without any power cap, there is no level limit, no race limit etc. A human can reach ultimate class and I'm sure that Draigg and Albion would've reached closer to Dragon God class if they hadn't been sealed.
I don't know if this is canon but there has never been any indication of there being a system that limits the inhabitants of the world of DxD and so I'm going with it. I think anyone in this world can become as strong as they want as long as they train for it and that's what I'm showing here. Thank you for reading.)
Zadkiel is currently looking through the magical system used my angels as he looked at the many spells in it. While they were able to just manipulate their powers to do things that they want, it is much easier to use a magic circle since that does it for them.
If it were to be said in modern terms, then their power is the electricity and the magic circle is the equipment. They will feed it the needed energy and the magic circle will make the effect it was made to do.
He doesn't have much of a need for the magic circles as his own prowess and control over his magic is enough for him to do things without the need of using one. However, it is far more easier to use a magic circle since they just need to evoke it, fill it with power and aim.
He is currently looking through the spells and making sure to learn the many things that were created. He decided that learning the spells of the angelic system will not do much damage as he might just find them to be useful when the time comes.
After he was done learning each and every one of them he left the system and went to do his duties as he looked at a pamplet on his table as he took it and smiled.
"Well, it looks like I'm going to be a husband now." Zadkiel said to himself with a smile.
*In Hell*
"Hey, do you ever wonder what the others are doing in Hell?" Asmodeus asked Beelzebub.
"Other than controlling the land as they please? Well, Iblis and Livyatan are looking forward to their marriage, Lucifer is in his own land and doing who knows what. You know how his complex is." Beelzebub said as he is tinkering with a magical artifact he is creating.
"Well, you can't be an Angel without knowing about to, well demon now. In any case, how are things going on your end?" Asmodeus asked with a eye roll before being curious.
"Well, I have the time to create things like those." Beelzebub said as he pointed at a group of other things he had created.
"And what are those exactly?" Asmodeus asked with a deadpan.
"Just some things I created her. Like that one can create a miniature sun, that one can create a blue sun, that one can make a pseudo black hole, that one let's you control fire, water, earth and wind, that bottle let's you trap a spirit inside it." Beelzebub listed out as he worked on it.
"And why pray tell did you create all those things exactly? I mean, those are things that we can do can't we?" Asmodeus asked him as he looked at him.
"Yes well that's only because of the training we have. Don't forget that Zadkiel is only as strong as he is today because of his training and that goes for all of us as well. Father may have given us power and understanding, but it is only for one single aspect. Like Baraqiel with his lighting, Michael with light and others. You know as well as I do that just having power won't do it, if you don't know how to use it properly." Beelzebub said to him as he looked at his brother.
"Right. And we weren't born with the power to destroy several planets and the galaxy." Asmodeus said with an eye roll.
"Of course we had those powers, we were archangels for a reason you know, of course FATHER would give us power of that level." Beelzebub said to him as he looked at him.
"Still, have you wondered if you would be able to do what Zadkiel had done before?" Asmodeus asked him curiously.
Beelzebub stopped at that as he thought about it before he looked at him.
"He is simply far more powerful than me, I didn't reach that threshold because I'm more interested in knowledge that growing stronger. Though I guess I should start." Beelzebub said to him at that.
"Yeah, also, don't you think Erebus has been becoming a bit annoying now?" Asmodeus asked him as he looked at his fingers.
"He has actually, might be because Zadkiel defeated his sister." Beelzebub said to him with a nod.
"Yeah, it was pretty shocking when I felt a large amount of energy outside of Hell and was shocked to see an explosion as big as the universe, though that didn't compare to how Zadkiel just controlled that power as well. That look on Nyx's face was priceless." Asmodeus said as he laughed at the memory.
"I'm not surprised. Primordials like her seem to think of themselves as being only being able to be defeated by fellow Primordials. One thing they do not think about is how we don't have any kind of rule that says that only a Primordial can defeat a Primordial." Beelzebub said with a chuckle.
"Yeah, as long as one is willing to train they can become as strong as they want. There is no actual ceiling to our own strength after all. It boils down to whether or not something actually wants to train." Asmodeus said as he juggled a ball of hellfire in his hands.
"Yeah, but we might have to fight Erebus if he does try to attack us. Since this is Hell I don't think we can count of Heaven's protection." Beelzebub said to him as he created a few adjustments.
"Yeah, by the way, what are you making?" Asmodeus asked him as he looked at the artifact.
"Something like a perpetual energy source." Beelzebub said to him with a flare.
Asmodeus just looked at him at that before he shook his head and walked away and disappeared as Beelzebub watched.
"What?! It's a good artifact, even if we have a lot of energy!" Beelzebub shouted when he saw his brother leave.
Beelzebub just sighed at his behaviour and then walked to work in the artifact, trying things out and creating things that can do things that only some of them could do. Well, that was an enticing thing for him.
Besides, making things using entirely his own knowledge and without any kind of magic was something that he liked very much and he would also be able to brag to his fellow siblings when he gets the time. He looked at the table for a second at the pamplet on it before he worked again.
Asmodeus meanwhile had also came back to his own land as he had created a large castle for himself which is as big as a large mountain with many room and other things. He smiled at the thing he has managed to create. After that he went to his armory which had many weapons and armors as he smiled at it.
While it is true that he likes the body of females, he also likes physical combat since it involves the use of their own bodies. And that has caused him to favour the use of weapons than energy attacks, it can be said that he has lust for the flesh of women and for battle, though the former outweighs the latter.
"Hmm, I should try my hand in creating my own type of women." Asmodeus said to himself as he thought about it.
He already has a few ideas, seeing Lilith with her horns and demonic appearance had an appeal to it and he wants to base it on her.
"Horns, tail and wings, and a curvaceous body, yep, that's going to be good. Now I just have to make an actual living being from scratch." Asmodeus said to himself as he frowned at the thought since it is very difficult.
No matter how easy God had made it seems like, creating new life is not easy. There might be something wrong with the thing that was created, maybe their bodies aren't correct and they might die on the spot, or they might not have a good enough spirit to be able to exist. Without any guidelines, creating an entirely new living being is very difficult to do. That is something he also knows as he hopes that he will be able to learn it quickly.
"Well, I have all the time in the world right now so it's no big deal." Asmodeus said before he started to think about how to do what he wants.
*In Orun*
"Hmm, God truly has created a powerful force." Olorun, the supreme God of the Yoruba Pantheon said as he sat on his throne.
He had seen the fight between Primordial Nyx and Zadkiel and was impressed by the power that was shown by the angel against a Primordial of the might of Nyx. He also saw how Chaotic many of the younglings of the other pantheons are and how they hunger for greater status amongst themselves as he sighed at their children.
"I suppose it is asking too much for children to not resort to needles violence." Olorun said as he looked at them.
He is a supreme being, of the same rank as God and the others and it could be said that they are siblings in the sense that they have been existing for the same time.
He also felt shockwaves as he frowned before he rubbed his forehead as he sighed.
"And Red and Ophis, why can't they just float there without fighting? It's not that difficult." Olorun said as he sighed at the behaviour of the two of them.
'Well, at any rate, I don't think it would be a problem if I were to attend that ceremony.' Olorun thought to himself as he hummed in thought.