Chaos is begetting Chaos on its own so he doesn't need to work actively to empower himself. It is like his existence set off a domino of chaotic events. It started as a tiny situation of a low rank demon killing mid rank demons to become a high rank demon threatening the demon lord and will culminate in a war that will take the plane by storm all the while strengthening him in the process. His Accumulation ability is great that way, it is also much stronger than those of other demon nobles.
Accumulation can be used to raise the state of existence or can be used to attack. He has a divine rank accumulation, he can raise his state of existence from 5 of a high-rank demon to 17 of a demon lord. It is the limit allowed and the increase is also temporary.
Accumulation is great but it has a huge weakness. Once it is used, it is gone forever. There is no limit to how much of it can be stored but its use is limited. Each amount of it used to temporarily reach this limit is gone.
The limit to the boost of Accumulation is based on the increase in the state of existence and the power rating of the attack that can be created with it. They both are at the demon lord rank for Aeternus but they aren't the same as other demon nobles. Most demon nobles have a lesser boost.
It is like booster fuel. There is also a difference in usage. A higher-rank Accumulation has a better utility and a better diminishing return. A lower rank Accumulation will cost more for the same boost and will incur a higher increase in cost to maintain that boost. The rank of Accumulation also affects how fast it is regenerated. All these reasons are why demon nobles strife for the one universal thing that can increase Accumulation, divine power.
Demons don't hate gods because of principle and ideology. There is no hate in their conflict just a struggle for resources. Gods have divinity and divine energy, demons need it so they try to kill gods. Aeternus has never needed divinity but other demons like them because it is more efficient than collecting biomass from the dead bodies of other demons. The conflict continues to the level of demon kings.
Different demons Accumulate power based on different things and at different rates but divine power from Gods will work for everyone. The fact that the cost of usage of accumulation is different for all demon nobles makes divine power more valuable to those with a lower-quality Accumulation. It is their best method of catching up in power.
Aeternus might not have a poor Accumulation ability and, is doing well in terms of his rate of Accumulation, but Divine power is a great way to accumulate power too. He just needs to reach a certain level of Accumulation enough to sustain his limit, then he will be able to fight demon nobles without a disadvantage.
It is one of the major incentives for him to leave the plane and attack divine planes through the abyss altar but he can't do that yet. The demon lord will be watching like a hawk and will be waiting for him to do that.
He doesn't need any other resources like other demons because of his infinite chaos energy but he will certainly need divine power for his Accumulation and divinity to upgrade his other stats to the half-divine rank. His chaos energy achieved it on its own and breached the 54 Stat limit but his other stats will need it.
His soon-to-be members of the House of Khaos will also need it or else the demon lords he creates won't be able to match Beelta at all. So something has to be done about the lockdown that she has placed on him. But he isn't worried because he isn't alone and has never been. No Legion Clone is ever alone.
He doesn't plan to risk using Legion-1's domain. He has something better planned. A surprise for the demon lord from Legion. But for now, he will wait and spread the word.
Soon the word spread. A noble house is being formed in the domain of high-rank demons for the first time. It caused a few sneers and snide comments. A noble house needs a demon noble, but a demon noble can't live in the domain of high-rank demons. That is common sense and to suggest otherwise is to believe high-rank demons are stupid.
You can call the lower ranks of the demon hierarchy stupid, but not high-rank demons. Then the news got more absurd. The Head of the house, this so-called demon noble that can survive in the domain of high-rank demons, can also make high-rank demons evolve into demon nobles.
Imagine that. Now the high-rank demons know that the news is fake. For a demon noble to live in such an area with low sin energy and yet be sustained, that demon noble has to be weak. How can such a weak demon noble have such a power?
Apart from that, it is common sense that the demon lord is the only one that can do this. But then they heard that the demon noble in question is the Ominous Reaper of Darkness and they started believing the news.
In fact, public opinion took a 180-degree change in direction about their belief in the news.
How could it not be believed? The Ominous Reaper killed 300 of the best high-rank demons in the plane. And from what demons heard, he had done it as a mid-rank demon and with a single move too.
There are some geniuses that can terrorize high-rank demons due to the possession of the Accumulation ability. But these demons are also high-rank demons and none of them were so notorious that high-rank demons banded in solidarity to put them down.
Everyone suspected that the Ominous Reaper will become unbelievable when he evolves to become a high-rank demon. What is more unbelievable than the news that he can make high-rank demons evolve into demon nobles?