Helios tried his best. There is no way to permanently get control of the Authority of Order that he knows of without becoming a half-celestial of Order. He is already the half-celestial of the sun and the Celestial Supreme is not looking to possess him. Not that it is possible for a Celestial to possess someone, even if that someone is a perfect vessel for possession like Helios is.
He raised his hands to the sky and proclaimed theatrically. "I have opened the gates of hell. I have ushered in an era of chaos and war. I promised and I delivered. I hope Zargoth plane will play its part in this dance."
Then he snickered and thought to himself. 'It's not like they have any choice.'
Legion remembers every slight and fully intends to pay back those who offend him with the same coin. There's the dragon vendetta but that is still in the works. There's also the time he was made into a source of entertainment for mortals and gods alike. They robbed him of his pleasure and he promised to give them pain. He has delivered on that promise today.
Call him petty but it can not be denied that he is reliable. Besides, what he has just done gives him pleasure and advances Legion's agenda. So what's not to like? The inhabitants of the Zargoth plane might not like it so it is unfortunate for them that they can't do anything to stop him. It's too late now.
He was reveling in the pleasure that comes with dooming a civilization to death and destruction at the hands of demons when the plane itself responded. A previously dormant Will or consciousness woke up and focused on him. The weight of the gaze felt heavy and powerful. It froze Helios where he stood.
He mumbled inwardly. 'Me and my big mouth.'
He began to regret enjoying the Calamity that he has caused. He just couldn't revel in it quietly and to himself. He had to announce his deeds to the world and draw this entity's attention to himself. He doesn't know what's going on but rarely does something unexpected become a good thing. No clone of Legion has experienced such a thing so he didn't know what to do. He tried to move but it failed. He could only think and even then his thoughts were slow.
The consciousness examined him and judged him worthy in what felt like an eternity but only took a second. It broke its hold on Helios. Then it brushed its nascent mind against his.
It said quietly "Worthy warrior. Make child. Defend the plane."
It communicated with more intents and emotions than words so Helios understood what it was saying and who it was.
"Hahahaha."
Helios began to laugh. He fell to the ground and continued to laugh. He held his stomach and laughed harder than he has ever laughed before. He rolled on the ground just laughing. The nascent consciousness waited patiently for his answer.
He didn't reply until he had gotten the last of his amusement out of him.
"No, thank you." He said.
The disappointment radiating from the nascent consciousness was palpable. It was like a sulking child but he didn't care. There's nothing to be gained by becoming the child of the plane of Zargoth plane. Zargoth is no Virut plane. It is weak and it is dying.
Legion intends to take control of the plane and overhaul it at the end of the day. They plan to use it as another staging point as an alternative to Soverick's identity but there's no way that they are willing to tie themselves together with the plane.
There's no origin energy. Not a tiny bit much less infinite. Mana is even lacking too and yet the joint consciousness of all life on Zargoth plane wants him to defend it. What is there to even defend? The entire plane is a barren desert. Someone even tried to split it in half. Zargoth plane is already lucky that Legion's actions are benefiting it. It shouldn't ask for more when it doesn't have anything to give.
The nascent consciousness didn't give up. Weak as it is, it recognizes Helios's worth so it tried to be reasonable.
"Make Better. Give Power. Quit Anytime."
Helios considered the deal with other clones. He tries to make the better. In exchange, the plane gives him support and he can quit being the child of the plane anytime. All the power in their relationship will be with him and he has nothing to lose.
It is a good deal, one that the will of all living beings had to make. It is weak and dying. This may be its last chance to change its fate. Giants of order have bled it over the years while he provided it something really important. By opening the portal to the abyss directly into the plane, he allowed mana to pour in.
The plane needs mana. It doesn't care where it gets it from right now. It is willing to make a deal with a demon to get mana. Helios did it once before, he can surely manage it again and make it even more permanent. The will of the plane doesn't care about the demons that will accompany the mana. It only cares about survival.
"Alright, I'll do it. You owe me big time." Helios accepted the offer.
Becoming a child of the plane is mythical because there is hardly anything a single person can do to affect the course of the fate of a plane. It is also rare that the plane finds someone truly worthy to be its defender. But in this situation, it is the plane begging him to take the job. It is like he has been offered to be paid for his hobby. He can do it anytime and quit anytime. It is a dream come through.
"Thank you." The nascent consciousness said to him. Then it began the process of making him the child of the plane.