The demon is very lucky to get into contact with something like that. He had been previously unheard of, but he suddenly became known. She too will have her life changed once she gets her hand on it.
She believes that the weird demon must have come across the spatial artifact and also gotten access to the chaos energy through it.
The other option is that the weird demon is a weakened demon king and that the spatial artifact belongs to him in the first place. It will also explain why he is so strong for his rank. But that will only make her want him and the spatial artifact more. Eating him should grant her his authority.
She and her divine sense that was trapped within Aeternus's domain came to the same conclusion. They both believed he is related to a demon king in one way or the other. But while that divine sense felt regret for her actions, Beelta felt increased greed. It's a situation commonly seen amongst Origin gods. When you don't know how you died and what killed you, there's a good chance that you will repeat it.
She wants him so much but there's nothing she can do right now to get him. She could feel his rising energy state which means he is evolving. If he stays in the domain of high-rank demons then she will be helpless against him. He is going to be stronger and will be able to kill every high-rank demon she sends his way.
The only way to get him is if he leaves the plane through the abyss altars or reaches the domain of demon nobles. His mere appearance there will start a war for sure, but she will have more means at her disposal. The war will be tough but she is most likely to win it. So she will wait and watch him for now.
Back to Aeternus.
He woke up feeling refreshed. His evolution had made him fall into a deep sleep, unlike the last time. The cloud of Chaos energy around him shrunk and hung closer to his body. The chaos energy had thickened so that it seemed like he was wearing a huge and soft black-as-night robe. He stood up and felt his body and mind.
"No pain, that's good."
His body and soul had healed. He had even grown stronger. He could feel the world differently as if his senses have been enhanced which they have. He could finally sense the momentum of the plane but he couldn't use it because it was all under the control of another entity. He could also feel the presence of the energy well, so he would always be able to tell where the central point of the plane is.
There was an allure and presence of power coming from the energy well. It could be comparable to different qualities of wine. High-rank demons drink watered-down wine and they can see the original source of wine in its purest form a distance away. Unfortunately, the source is currently occupied by a very strong being. The entity in control of the energy well is also the one in control of the momentum of the plane.
"The demon lord huh."
His gaze was frosty as he looked at the center of the plane. He ignored the divine sense that is stalking him as his brightly lit eyes blazed like white-hot coal. The power of his soul had increased just like his body. Two huge horns are growing on his head and there's a dark red flame burning between them. It is a tiny flame but it is slowly increasing as it accumulated power.
Power from the chaos he has caused in the abyss by killing 300 high-rank demons was flowing into the flame. The absence of that many controllers of fortresses has created an upheaval far more than the small free-for-all he caused by taking on Danazel's alliance.
A war for power has started in the domain of high-rank demons. You can imagine the scene, of thousands of demons fighting and killing each other. The bond to abyss altars changing hands every now and then. Ambushes, Alliances, and betrayers happening all the time. Fortresses set on fire and being looted. So much Chaos and it is all empowering him.
The startling thing is that there is a more powerful supply of Chaos coming from his existence and that of the other legions apart from Legion-1. Their existence had broken the rules of the universe and it counted more than breaking the social order of a domain within a plane amongst the numerous planes in one of the abysses of the universe. Every world tree has an abyss but only one legion had broken the rules of simultaneous reincarnation.
This fact made him realize how much he outclassed the demon lord. He never feared her in the first place but now, things have been put into perspective. Legion-1 is an origin god. Origin gods are crazy, immortal sharks but are insignificant in the ocean that is the universe.
World gods are the massive continent-sized whales lurking in the very depth of the universe and capable of destroying realm trees singlehandedly. What about beyond that? A demon Lord cannot even compare to an Origin god. So what does a demon Lord count for then?
He exerted the strength of his soul and began to rise up. His soul pushed against the world and made him levitate. He didn't need to expend chaos energy or weave a spell, he could fly because he willed it. He rose while admiring the crater he caused. He stopped while he was 100m above the ground surface. It was double the height of the position they hung the boulders they tried to crush him with.
"It is a beautiful sight." He said as he looked down.
He hadn't grown taller, again. In fact, he hadn't grown physically at all, it is still the same body size he had as a low-rank demon, but the growth of his soul gave him an advantage in height that his body could never give him. He felt the majesty of the world at this height.