It is as the Celestials feared. Aeternus is not foolish. He will not be in a sorry state despite how everything looks. In fact, he is no danger at all. He can pass through the onslaught of attacks unscathed without doing anything if he wants to.
But he has to act as if he is in danger. He will do what they expect him to do in this sort of situation. He will reveal what is supposed to be up his sleeve. Because without this trump card, he should be in a sorry state. It is only normal for him to reveal it now to get out of danger.
The black round spot on his face suddenly bulged. It is like something is inside his head and is struggling to come out. The bulge expanded outward then it collapsed inwards suddenly. Everyone expected an explosion from his face so they were surprised when the bulge collapsed to become a whirlpool instead. The strange development of Aeternus's face didn't end there.
The whirlpool on his face looks to be very deep. Its depth is deeper than the thickness of his head. His head shouldn't be able to contain such a phenomenon. It is either that the space within his head is larger than it seems or that the whirlpool is connected to a distant location and not within his head. It could be anything considering that this is a demon king. Demons are weird and strange.
If they were informed, which they are not, it could only be one thing since this is an avatar of a demon king formed through the use of chaos energy, soul force, and the crown of a king. The whirlpool mixed those three separate components together and released them in the form of a beam.
A black beam was suddenly ejected from Aeternus's face. The beam is the same width as the black spot on his face so it is thin. The most important property of the beam is that its speed is very fast. It reached the Celestials almost instantly after it was released.
The Celestials were caught off guard by the speed and power of the attack. The beam tore through all the attacks in its way, the shields around the Celestial of Metal, the sphere that is the Celestial of Metal, and all three Celestials behind this powerful Celestial Supreme including the Celestial of Nature at the very back of the formation.
The black beam went through the avalanche of attacks and into 4 separate Celestials in the blink of an eye. It didn't stop its damage there. The beam turned to the left with a slight movement of Aeternus's head. So the beam tore sideways through the Celestials that it skewered like a kebab. Then it went on to slice into the 3 Celestials by the side of the formation.
The Celestials were in a kite formation. The Celestial of Metal was at the front and the Celestial of Nature was at the very back. There are two Celestial between the two of them. Then there are three Celestials on each side of this line. The four Celestials in a straight line took a critical hit despite them being ready for Aeternus's attack.
That beam was just too fast to do anything against it. No defensive measures would have worked either way. The beam tore through everything in a straight line including the shields that the Celestial of Metal put up and the other defensive measures that the other Celestials had equipped.
The three Celestials on the side were more fortunate. They had seen what happened to the first four that were hit so they tried to dodge. The beam injured two of them slightly and completely missed the one at the far corner of the formation.
One of the Celestials that was hit roared in anguish, "What in all of creation is this?"
But no Celestials had the mind to answer. They were all transfixed on what happened next. The four Celestials that were hit first including their Celestial Supreme fell from the sky. They are not dead yet but they are very close to it. Horror came unbidden within the Celestials that could still maintain their flight. If they had eyes, it would be bulging in shock right now.
Something that fast and deadly does not perform a lethal perforation of your existence without death becoming very close to you. The Celestial of Metal was vaguely aware of its situation but it doesn't know more than the fact that its condition is critical. It can't even fly anymore. That's something that a mana entity can do but it can't do. The world has disappeared in its vision. The only thing it can see and feel is encroaching darkness.
Even then it was able to tell them something as it fell. "Finish...the..the...fi....fight..qu..quick.quickly."
Its mind stuttered as it said that to them. Then everything became dark and it surrendered to its fate. Four gigantic entities fell from the sky pitifully. The ball of metal, the ball of vines, the pillar of ice, and the pillar of light fell and smashed into the battlefield below.
Such powerful beings were laid low by a single blow. Their unceremonious descent created a lot of Chaos on the battlefield and took some lives on impact. All the soldiers on both sides began to run away from them when the fallen Celestials started to ooze black corrosive smoke into the environment.
Four out of 10 Celestials have been effectively put out of commission with a single move which leaves six more Celestials. The Celestials still outnumber the demon kings by 2 to 1 but things are not in their favour. None of them have confidence in the fact that they outnumber the demon kings.
Things would have been against them had one of them died during the process of banishing the demon kings. That kind of victory would have been categorized as a pyrrhic victory. So four casualties at a time is a catastrophe.
But it gets worse. Their leader has been downed, their formation has scattered, and none of the demon kings has been killed. Things can only go downhill from here.