I know I have read this story before, and I just cannot for my life recall where or who it is by so I'm asking the geniuses.

This is what I recall:

Cas is leading heaven and must choose a mate.
Cas pulls Dean in as an Advisor

Cas informs Dean that Angelic Mating rituals start with choosing another Angel's Heaven and gift giving.

I think Raphael was in this and he gave Cas the death of a soldier for a gift.

Thank you for the help!

Jace

***UPDATE, Nov 7th, i have located this story. it is called, for love is immortality and it is written by andrea_dee***