The gorgeous promo fanart done by andrewonders!

On AO3 or FFN

Title: The Catalyst
Pairing: Merlin/Arthur - BBC Merlin
Warnings: None. Future chapters to be tagged.
Summary: (Post-Series.) Merlin will never die. Time has withered him to a standoffish, hollow mimicry of what he has once been. The boy who wore his smiles with pride and genuine feeling.The worst part is he never truly lives, not until destiny spits Arthur Pendragon back out.
Author Note: This has been two whole years in the making. I'm positively thrilled. My love to my betas and supporters. Thanks to my two Britpicks sermerlins and ememmyem and especially to once-and-future-shipper as half the inspiration because this is her victory too.