The Edge of All the Light You Have (BBC Sherlock) Sherlock/John

Title: The Edge of All the Light You Have
Fandom: BBC Sherlock
Pairing: Sherlock/John
Rating: PG
Word count: 1145
Warnings: Reichenbach Fall-related angst; alternate ending to episode; spoilery warning for temporary character death (highlight to read)
A/N: Day 7 of my August fic challenge. This is a timestamp for Do More Than Belong for reticento who asked for John testing the limits of his Healing power. Although it may seem weird, I want to thank hir so much for requesting this because I did not know that I had this story to tell and I don't remember the last time I had an idea grab me so hard. This world concept has opened up for me in a way I never expected, which I find wonderful. So I hope you all enjoy!
Fair warning: this really won't make much sense without having read the original story. The title is from a quote by Patrick Overton.
Also available on AO3.

Summary: For all of his Sight, Sherlock couldn't find a way to escape Moriarty's final problem. John absolutely refuses to let that be the last mistake Sherlock ever makes.

( His Quality snapped to life inside of him, the spark of his Healing just waiting to be unleashed. )