Fan Casting Felix Faust in Justice League Dark 3

Has made a deal with Neron to become even stronger. Initially fights the Justice League Dark, however once Neron sees the fight between them, Neron subsequently realizes he's a loose end and proceeds to put him in a catatonic state? Maybe the JLD try and question Faust as to how he became more stronger than usual, psychic blocks placed by Neron prevent them from reading his mind or stop him from answering completely. They get the feeling "someone else is at play here"