Have had the idea of a seraphim Gabriel for a while, recently thought of it as a "limit break" of sorts, under severe emotional stress he'd snap and suddenly be able to use a significant burst of magic (despite not being able to use magic of his own normally) before returning to normal and probably falling unconscious. Holy's animation from several FFs seemed like a decent choice, though I forgot the FFXIV holy animation is arguably *more*in the way/blinding than the ones I pulled as a reference.

Art from  palehorntea