"There is" you hear a sibilant purr, "another option."
You and Japhiel turn, and see the succubus. Japhiel reaches for his sword, then grins in an embarrassed way when he realizes he doesn't have one.
"I can help you to dispel the heavenly energy. I can make you into a beautiful succubus like me, or, if for some reason you insist on remaining male, into an incubus. It's a wonderful life either way, seducing"
"Don't listen to her" Japhiel shouts. "She wants to take you to hell!"
"Hell's not so bad" replies the succubus "Don't believe everything the angels tell you. But I'll make you an offer. Unlike some losers around here, I retain my full powers. I can contain the heavenly energy for twenty-four hours. You can spend twenty-four hours as a succubus or incubus, and then you can decide if you want to be that permanently. If you want to, I can expel the heavenly energy from your body. If you don't, I'll help remove the demon energy from you and you can go back to being an insipid human male. Fair enough?"
"Don't listen to her! She serves the Father of Lies!"