Brainstorm!: Lol. So Rayah is really depressed and maybe Poisidon can come or something. Maybe you can say Jace comes back to say goodbye and thats when he comes.
All you need is faith, trust, and a little bit of pixie-dust!
“And how shall I think of you?' He considered a moment and then laughed. 'Think of me with my nose in a book!” — Susanna Clarke, Jonathan Strange & Mr Norrell