The golden halo around the star is actually made out of several crowns of demon kings. The light bounces off of them as they revolve around the star so it looks like the star has a halo around it.
Each crown is an Avatar that he can use anytime to do his bidding anywhere in the realm or abyss. And unlike the avatars of other demon kings, his avatars have the power of Authority.
The snake demon king landed heavily on the smooth black atone on the top of the tower. He shook violently but he didn't wake up. Aeternus was on his throne. His body is even smaller than 10 meters tall. He is still less than 2 meters so the Colossal demon king dwarfs him by orders of magnitude.
The difference in size doesn't diminish his majesty though. He sat confidently as a king gracing a captive with the pleasure of his presence. Unfortunately, his captive doesn't appreciate the value of his presence. The snake demon king remained unconscious.
Aeternus didn't take offense to the behavior. He doesn't really need his captive to be conscious for what he wants to do to him. He raised one arm towards the snake demon king and pulled on his chains with his mind.
The bound demon king flew towards his hand. He must weigh thousands of tonnes the equivalent of millions of kilograms but he flew forward as if he was just a light feather. There was no resistance or struggle whatsoever. So his being unconscious is probably a good thing.
The snake demon king flew towards Aeternus headfirst to Aeternus's outstretched hand with his head. The head and hand collided like two mountains striking each other. Aeternus and the demon king of wrath were unmoved. But the throne groaned because it had to bear the brunt of the collision.
Aeternus caressed the head of his prize for a while. The head alone is bigger than him many times over so he only managed to caress a small inconsequential part of the head. Still, he did it because he is someone that appreciates his loot.
"Welcome to my divine plane." He said in greeting, "It is a pleasure having you here."
It is only right that he welcomes another demon king no matter the way they came to his plane. The snake demon king is still unconscious so he didn't hear the greeting. Aeternus did it anyway because being polite didn't cost him a thing. It is what separates the civilized from the savages.
Then he said, "It was nice working with you."
He activated his Chaos energy within his target. The wisps of black energy in the demon king's body went into a frenzy. They began to rampage uncontrollably. The snake demon king's eyes shot open immediately. His mouth spread open too. He used his mouth to utter the loudest scream that his weakened body could muster.
He screamed in pain. His entire being is being wracked by an existence-destroying pain. Even a demon king will scream. This scream was more of a roar. It caused the air to quake like thunder. And it traveled to the far edges of the plane.
The worst part is that his soul wasn't spared from the damage. His soul couldn't leave his body to return to the abyss because of the chain. It is very bad since Chaos energy can damage the soul too. So his body was eroded as well as his soul. It happened gradually and painfully. Aeternus could have sped up the deed but he wanted to enjoy the cries of pain.
He hummed to himself in appreciation. Even the demon king that he warped into his throne stirred due to the cry of pain. Something about the primal incomprehensible sounds resonated with its addled and broken mind. His throne felt a comradery with this suffering demon king.
Aeternus executed his captive and he enjoyed the process. Then it ended when the colossal body of the snake demon king broke down completely into chaos energy. The once titanic figure became a pool of black energy. The only thing that could identify him as a demon king is the golden crown hovering above the black pool. The golden crown is the most valuable thing about the snake demon king.
The snake demon king must have a stash of wealth in his personal space but Aeternus can't access it. Probably no one will be able to access it ever again now that the owner is dead. Not unless he left a way for it to be accessed which is improbable since he is a demon. There is no reason for demons to share how to get their wealth with others. Their selfishness will not allow them to.
"This will do nicely," Aeternus said as he beckoned to the golden crown.
He is not a picky person. This shiny golden crown will have to be enough for him. He smiled and his golden eyes shone in anticipation as the crown flew to him. It sank into his skull and into his soul.
His soul glowed resplendently. It appeared around his head as a phantom. It looks like a bright round gem. There is a thick golden ring around it. There are also other golden rings hooked into the ring around his soul.
The thick golden ring around his soul looks like a key chain while the attached golden rings are like the keys. The extra golden rings are attached to the main ring that is bound around his soul. The new golden ring approached this gem which is his soul. It moved and attached itself to the main ring. The two of them made contact and fused to form the attachment.
Then the soul phantom collapsed into his head and disappeared. Aeternus's golden eyes began to shine brighter with the addition of another ring. There are more than 30 golden rings already on his soul so this might be the straw that finally breaks the camel's back.
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A/N: Bonus chapter for reaching the voting goal.