His major problem here is not death. He is not scared of death at all. What he is afraid of is having the network of Legion exposed to the demon god after his death. This possibility remains because Legion-1 has gone to inquire about demon gods and has found out that anything is possible with a supreme law.
He is up against an entity with a supreme law so it is possible for his soul to be forcefully assimilated. It is also possible that death will not save him from the demon god. But he hasn't given up. He won't give up until he is dead.
His best bet for freedom was for the tree father to assist him in breaking through. The supply of divine life energy and his powerful soul will fight against his body. The plan is to cut off his body from his existence. It will kill him, but it will also cause his connection to his body to be severed.
He got that idea from Rinoz's stupid attempt to help him. Unfortunately, a lot can go wrong with that plan. The demon god might actually be lying about not being able to do anything forcefully to him. He can't risk the whole of Legion because the demon god said that a blood writ based on itself is stopping it from attacking his soul.
It might be true that the demon god is unable to do anything to him because of the Oath he made with Xigger. But it is also true that the demon god certainly can break his Oath if the benefit is ample enough.
If the demon god was lying about it, then it must be waiting for him to show more of his secrets or do something interesting under his false sense of security. And if the demon god was being truthful about its incapability to assimilate his soul forcefully, he definitely shouldn't give the demon god ample reasons to break the Oath.
Getting the help of divine energy from his soul will certainly make the demon god curious. It might not be enough for the demon god to break the Oath, but it will surely fight to retain the connection with him. Then he will have to show his overly powerful soul and expose his soul force to fight off the demon god, which indicates his connection to an Origin soul. So that plan was eliminated for being too risky.
The best thing that he can hope for right now is for the demon god to consider him not worth breaking an Oath for when the child of the plane comes to kill him. He is relying on luck which he doesn't like. But he doesn't have any other choice.
Unfortunately, even that is unlikely to happen. He has some guesses about the so-called child of the plane, and he doesn't think she will be able to get to him considering what he knows about the title of child of the plane and the Emperiti Primogenitor's defenses.
His next best bet is for Helios to figure out something useful from the experiment that he is conducting with the body that Beelta left behind in the divine plane of the Zargoth plane after her defeat. Maybe something about Origin energy or Chaos energy will liberate him from the demon god.
That is even too much for him to ask for right now. He will be grateful if he is killed by whatever Helios is cooking up without the demon god being able to do anything to him. Origin energy causes demon flesh to explode after all. Maybe his body and the heart of Carnage can be destroyed, and he can die in peace.
---
Emperor Rinoz is powerful. She managed to kill many Sovereigns of law. Hundreds of Sovereigns died to her in a single attack. Many more were injured. That is very impressive. However, she also has a glaring weakness. Her weakness became evident to certain beings early in watching the live recording of the fight.
No one knew of this weakness before. It is understandable since no one had any information about her. If they had, perhaps things would have turned out differently. The Sovereigns of law that died to her wouldn't have perished so easily.
If her weakness had not been identified quickly, a lot more deaths would have occurred as they tried to figure out her weakness. They might have eventually figured it out after several rounds or by chance. But they didn't need to.
The Vampires, including a demon god and several other Primogenitors, were observing the event. Thus, her weakness was identified after her first attack. The demon god informed the Emperiti Primogenitor of it, who then ordered her familiars to retreat. Instead of fighting Rinoz and defending the devil's pit, they returned to the devil's pit and sealed the opening's gate.
Sovereigns are exceedingly fast, so they managed to escape quickly enough. The other, less powerful familiars were less fortunate. Some were lucky enough to survive, but most were killed by Rinoz, who was shooting Star Novas everywhere in excitement. Explosions rang out again and again because of her.
She noticed the retreating Sovereigns, but she didn't care. She didn't think she had a reason to worry. After all, their reaction is not strange. Her enemies are supposed to run terrified for their lives after witnessing her display of power. Thus, the retreat was not unexpected. Besides, she didn't want to leave the other slower Warrogs behind.
She killed everything in sight and advanced with her army toward the devil's pit. They reached the edge of the crater. She stood imperiously at the edge and looked down at the sealed pit.
The pit was about 1 kilometer wide, indicating that the gate sealing it must be monumental. It had runes that empowered it and even emitted fluctuations of laws. It could be deduced at first glance that the gate is very powerful.
Addressing her army, she declared, "Here we are. They said that we wouldn't be able to take the devil's pit. Yet, here we stand at their very doorstep. It is because we are unstoppable."