A Three-Way Battle.

The golden ball on his back finally grew to a diameter of 100 meters. It became bigger than Helios himself. The heat it was radiating had melted the material that made up the ant mound for 1 kilometer in every direction within the ant mound. The heat isn't affecting him because he is technically a demigod of the sun but he is suffering in other aspects.

His body became a battleground similar to the time he was a fetus. This time it is divine energy that is the opponent while the law fragments in his Stigmata are his helpers. Unlike the time he was a fetus when his pregnant mother took the fall for their conflict, he has no one but himself to go through the pain. 

The divine energy is also not freely given. The sun god is very pissed at him right now. Stelios might not have had a choice about leaving part of his power behind, but he will fight Helios for its control every step of the way. This is not a boon that he will take without a fight.