The three demon kings attacking this plane stood at the very back of their army as they watched the ongoing fight. Their Heralds used to stand around them but they have been sent to lead the demon army into battle. They are needed to fight the grand gods.
Aeternus is one of the three demon kings. His avatar is a tall dark red armored monster. He has claws the size of knives on all four of his giant arms. His dark red skin is not smooth at all. It is lined with sharp tiny spike-like thorns. There are other spikes that extend from his elbow and knees that reach lengths of a meter. These spikes can be used as improvised spears.
His head doesn't have any eyes, mouth, lips, nose, or ears. It is a horrible-looking faceless head with a crown of golden thorns ringed around it. There are four red horns with golden tips on his head. There's also a dark round spot in the middle of his face but it doesn't look useful. It seems significant only because it stands out against his red skin.
He has four dark wings made of black flaming feathers on his back. The four wings are flapping and holding him up in the sky. This gives him a good view of the entire battlefield. It also enables the defenders to gaze upon the terrible visage of the monster that has brought death and destruction to their peaceful lives.
What they see is terrible indeed. His broad armored torso ends in two thick trunk-like legs. The armor he is wearing is thick and heavy black armor that covers his entire torso, some parts of his arms, and his legs. He drives fear into their heart just from the sight of him.
Everything about him makes them afraid including his choice of weapon strapped to his back. It is for when the spikes and blade-like claws are not enough. By the looks of the spikes and claws, rarely will his claymore be needed.
The Claymore has a grey-colored handle attached to a sharp black blade filled with shimmering red runes. They know his claymore is sharp because every divine sense that comes close to it to examine is split apart. Many a weak god has died from gazing on the edge. The thought of what the edge can do to them if it touches them fills them with terror.
The gods that are fighting for their lives and dying to protect their plane know that they are dying for nothing. They know that this invasion will not end as long as he still stands. He is their source of terror and the root of their calamity. But to him, this war is just business as usual. It is as stimulating as a morning jog. If not for its importance, he would end it now.
He levitated in the air while the other two demon kings flank him. The female demon king is a demoness of lust. She is also a succubus. She has black bat wings and hooven feet. She has a slim tail attached to her back that swings about playfully. There are two cute ram horns on her head and a bosom the size of watermelons. Her breasts are what one will call knockers. They can actually knock someone unconscious.
Her waist is tiny and her hips are wide. She has thick legs and a cleavage that is to die for. Her face is perfectly symmetrical with a beauty beyond the comprehension of mortals. Her red beckoning lips and playful eyes complete the seductive ensemble. Her scantily clad attire does nothing to hinder the display of her physical gifts. It instead makes her overwhelmingly seductive.
The color of her lingerie-like attire is red like the color of her lips and it has some black strips holding it together. She is a temptress and a very good one too since she embodies lust very well. Her body is lust incarnate and she has the golden crown on her head to show how successful she has been at embodying lust.
Anyone who thinks the only thing dangerous about her is getting drowned by her generous bosom will find that they are very wrong. He looks like terror incarnate but they will still look at him in defiance and fight him despite their fear of him. As for her, the defenders are too afraid to even look at her.
They have had a lot of examples to show how dangerous it is to look at her. Numerous gods have given up fighting because of her. They ignored the battle on around them and rushed towards her to worship her. They would rather die to him than succumb to her so they are more afraid of her. If they succumb to her, they will lose all their self respect and die in eternal shame when their own friends kill them so that they don't spill any secrets to her.
The other demon king is a demon king of wrath. It is a reddish fire-breathing snake demon. It has a humanoid torso but its head and lower body are that of a snake's. It has two arms each holding a short curved weapon. The blade of the weapon is black while the hilt is red just like the scales of the demon king.
The demon king has two eyes blazing with white fire. Smoke is coming out of its nostrils and liquid red fire is leaking from beneath its scales to the ground. It is like lava is leaking through a tight container. The lava doesn't drip to the ground. It is scattered about by the wind of the flapping giant wings of fire on its back. It also has a golden crown on its head to indicate that it is also a demon king.
The three demon kings are cooperating to invade this plane. A single demon king is already a problem for a plane but three is an existential crisis. Aeternus was the one to reach out to the other two for collaboration. He is just one demon king and unless he wants to expose the secret of his crown, he can only attack with a single avatar instead of more.