He began the breakthrough with ease. His soul wasn't pulled taut as others do theirs. It expanded on its own and superimposed itself on his body. He is his soul more than he is his body. There's no need to force his soul to behave. It is his body that will give him trouble, not his soul.
His soul didn't experience any pain or discomfort from leaving the soul realm. His soul could already exist in the physical world as a Sovereign when he separated it painfully from his high elf body. So this isn't a problem at all.
He was about to begin the fusion of the physical body and spiritual soul, two of the aspects of his existence, to achieve transcendence when the Stigmata on his back activated. It shone brightly like never before and began pumping divine power into Helios's body. It was like a river of divine power started to pour out from it instead of the trickle that ought to come out of it.
The limit of the Stigmata has been increased by the Tree father so a lot more divine power rushed into Helios's body. The sun god never planned for the Stigmata to supply so much. Helios's sun core swelled with power and his skin turned golden. If he can handle the divine power and survive his breakthrough, then he will be a very powerful transcendent. It appears he is taking advantage of the sun god's assistance.
POV of The Sun God.
Stelios was distressed when he saw the royal guards take Helios away. His heart ached in ways none of the gods would understand. So he was very angry and he was ready to start hell. If they thought that Harkam overreacted then they won't know what to say about him when acts.
He promised himself. 'I'll make you all regret what you did today.'
Helios is his lifeline so all that rubbish that the Celestial Supreme was saying wasn't getting through to him. Already, he is planning how to cause chaos in the mortal realm and how to usurp the Celestial Supreme. It was then that he sensed that Helios had started his breakthrough to transcendence.
He exclaimed. "Oh, crap."
He thought to himself. 'That boy is trying to break through to transcendence in such a precarious situation. I understand that he is desperate for strength but isn't he rushing it? It's too dangerous for him. I have to go.'
He said to everyone, "I have to go."
He canceled his avatar and left the meeting in the Temple of the Gods so that he can focus on Helios's situation. He didn't listen to the Celestial Supreme's refusal to let him go Stelios sat in his divine kingdom while carefully sensing the changes within Helios's body through the Stigmata.
He sighed in relief when he discovered Helios is still alive.
"So far so good. I would have preferred to have him do this under ideal conditions where he is safe but this will have to do."
The breakthrough process was going on without a hitch despite it being too fast to be safe. He was surprised that Helios could manage something decent in his desperate situation as a prisoner. If he had his way, Helios would have broken through under the protection of the church so that nothing will go wrong with the process. This is an important matter both for Helios and for him. But things are going well for now and he has to be content with it.
"It's time." He said with excitement as Helios was about to begin the fusion.
The cores of demigods affect their breakthroughs to transcendents in a beneficial manner. The divine power contained within it helps them to reduce the power of the law fragments in their body and make the fusion of soul with body easier.
It rarely happens, but there are certain situations in which the body resists the fusion. It occurs in the case of giants of order. As always, divine power is the bane of order. Helios has 4 portions of divine power in his core already after absorbing 3 sun cores. This should make the breakthrough process very easy but that won't happen.
Stelios intends to take advantage of the divine power to interfere with Helios's breakthrough. His divine will within the Stigmata on Helios's body activated and opened a channel that led to Stelios. Stelios grinned evilly as he allowed divine power to flow into the Stigmata. Without his permission, divine power will not flow. But then he noticed something. The Stigmata was taking too much.
He was perplexed for a while before he began laughing. "The heavens themselves are helping me. I knew this boy is highly compatible with me. He is destined to be my vessel. I shall be reborn."
The Stigmata isn't supposed to allow this much divine power through but apparently, Helios seems very compatible with the divine power. He is like a foam just soaking it up. Stelios became happy about it so he allowed divine power to flow freely. The more of his divine power is within Helios, the easier his possession will be for Stelios. He doesn't intend to have a vessel for an avatar but a vessel for possession.
Gehaldirah is not the only one to have ever thought of reincarnation nor is he the smartest one of them. There are several people that tried and failed to perform it. What made Gehaldirah special amongst others is that he was a sovereign of life, with abundant knowledge of life, formation arrays, and with a lot of life essence at his disposal.
Stelios is special too. He is a genius who has had millions of years of experience and he knows what he saw in Helios on that day when is mother came to ask him for help. He saw something special in Soverick that will make him a very good vessel for possession and he has not been wrong so far. The Divine energy of the sun god within Helios is the key.