Harvesting His Loot.

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.