Both Have Fallen from Grace (http://archiveofourown.org/works/2178789) by wakingonprospit - Series Part 1 of Escaping Grace (http://archiveofourown.org/series/423778)
Mature - No Archive Warnings Apply - M/M - Complete Work - Words: 31,435
No Archive Warnings Apply - Castiel/Dean Winchester - Dean Winchester - Castiel - Castiel (Supernatural) - Sam Winchester - Suicide Attempt - My First Destiel Fanfic - Destiel - Freeform - Fallen Castiel - Wings - Winged Castiel - Depressed Dean - Suicidal Dean - Suicidal Thoughts - Guardian Angels - Guardian Castiel - Fluff and Angst - Alternate Universe - Hunter Retirement - Arguing - Angry Dean - Hurt Castiel - Protective Castiel - Angel Castiel - Hurt Dean Winchester - Hunter Sam - Unrequited Love - Love Confessions - Friendship/Love - Friends to Lovers - Fallen Angels - Secrets - Secret Relationship - Declarations Of Love - Boys In Love Love

Summary After a failed suicide attempt, ex-hunter Dean Winchester wakes up with a hand shaped burn on his left arm. Later that night, he finds a strange man with wings, claiming to be an angel, in his car junkyard. The man is badly injured and Dean, against better judgement, takes him in to nurse him back to health.

This one don't invole Castiel, still I can rec for you bc if you like the hight H/C and can take the torture: [human Dean got wings (no flying´], well witten and in-characters
The Ones Who Have Gone Over (http://archiveofourown.org/works/501915) by reapertownusa
Mature - Graphic Depictions Of Violence - Gen - Complete Work
Graphic Depictions Of Violence - Sam Winchester - Dean Winchester - Victor Henriksen - Hurt/Comfort - Hurt Dean Winchester

Summary A planned day off goes to hell when the boys are abducted by a doomsday cult, who use Dean in a brutal ritual sacrifice that nearly kills him. Sam struggles to help his brother heal in the aftermath of the attack.

Thanks so much for all of these! I read "Hummingbirds" yesterday.