Zernon became flanked by 5 helpers as he stared at Helios. Each Archangel is the equivalent of a Sovereign. Their presence renewed their presence.
He asked, "So what next? would kill me and take my position as the Celestial Supreme? Your father must be very proud."
Helios shook his head. "No. I already have what I came for."
He pointed to their surroundings. Zernon widened his eyes in realization. The entire army of the gods and the angels has been wiped out. The cloud of fire rain had continued to fall while they were fighting, it decimated everything on the battlefield, except for the forces that Zernon had held back.
But even the reserve forces were not spared. Zernon may have blocked the attack with the power of an exploding star but those behind him couldn't. That arc of heat and light sheared through his reserve forces and thinned their numbers. So only the Archangels that stood at the very back of the army are safe. Everything else is toast.
Zernon's eyes flared up again. He was about to attack when he remembered that he is not Helios' match.
He said to Helios, "Well done."
Then he began to retreat with his bodyguards of angels. Helios watched him go without doing anything. It was only after the Celestial Supreme left Armageddon that he moved. The first thing he did is to pick up the two arms that he cut off from the celestial supreme. It is the most important thing he came to the divine plane for.
He smirked to himself. "I lied. Now, I have everything I came here for."
He targeted the army of angels to bait Zernon. His real aim is a body part of the god of order. He distracted Zernon with the damage to the army so the god of order did not make sure to destroy the arm before he left. He wasn't leaving on his own accord anyway. He was retreating after a defeat so the two arms that he lost is the last thing on his mind.
In a normal situation, he doesn't have anything to worry about concerning the arms. No one targets a Celestial Supreme for their body parts. At least not in the Zargoth plane. He has never had to protect his arms from someone because they have never been cut from him. Also, the arms should disintegrate soon and become useless. Unfortunately for Zernon, Helios is not normal.
Helios knows that the consciousness, the divine powers of a Celestial, and their bodies are fused. So the body part of Celestials is a very important divine item. He even knows something that he can use the arm for. He also knows that he just has to offer these body parts divine power to preserve them.
He chuckled darkly to himself as he is thinking of all the things he can do with the arms. Next, he took back the body of the demon lord and the demon nobles. Then he left the divine realm and returned to the mortal realm. That marks the end of his short trip in the divine plane.
He can kill the Celestial Supreme at a cost but he should not. At least, not until Stelios is out of the picture. If he kills Zernon, then the title of Celestial Supreme will go to him or more likely to Stelios since he is the real sun god. It might not happen but it is not a risk that Legion is willing to take especially with the cost involved.
Zernon allowed his son to live when he was a baby because that poor behemoth is not a threat to him. Zernon had two Authorities while the boy had one. When he noticed that the boy is reclusive and harmless even with one Authority he decided he can accept the boy's existence.
That's not going to happen if Stelios gets that second Authority. Helios might be stronger than Stelios right now, but Stelios is the true Celestial of the sun. Even if Helios manages to get the title of Celestial Supreme instead of Stelios, he doesn't want to become the Celestial Supreme because he will need to cut off his path of perfection. The tree father is a much better candidate for that not him.
Apart from that, the situation isn't optimal for killing the celestial supreme. Zernon and his 5 angels outnumber him and will be tough to defeat. There's also the multitude of gods around. They might join the fight when he is about to kill Zernon. They didn't interfere in their fight earlier but they might interfere if it is clear that he is winning.
Zernon might be a control freak but he is one of them. Helios is that brat that killed a poor half-celestial, specifically by butchering him and using his body to open a channel for demons to enter the plane. That is a betrayal to all giants of order. The gods will choose Zernon above him anytime. The evil they know and are familiar with is better than the evil that may shine brightly but is unknown.
It is too risky and too dangerous to try and kill Zernon right now. Legion isn't willing to put Helios in danger yet since he is the strongest clone in the Zargoth plane. Without him, they will lose their heavy hitters. He might have to face the entire pantheon if he wants to kill Zernon only for Stelios to get the Authority.
So his job in the divine plane is not to kill Zernon, it is to get a part of Zernon, capture the demon lord and demon nobles, then wipe out the army. Destroying the army of demons means that the 541st plane is at its weakest, just ripe for the taking. Destroying the army of angels has reduced their protection so that it will be easier for them to be attacked in the future.
The demon nobles are for Aeternus to grow his mark of sin while the demon lord and Zernon's two arms are for Helios to practice his Rune making with. He has been able to achieve this much with his knowledge of runes, he believes that pushing the boundary of runes and how they are empowered with Order to create things is the key to finally understanding how the Authority of gods works and hopefully breaking another law of the universe. Zernon was targeted because he is a very powerful source of Order.