A Deal With The Devil

With nowhere to go, after the murder of his mother, Percy summons the Devil and strikes a deal with him. A deal for his soul. He sells his soul to the Devil to become his apprentice. For Satan to take him under his wing. To become a punisher of evil. To become his heir. Even though he is apart of a different religion, the life of a demigod catches up to him, throwing him into a three-way war.