Hello! I’ve been searching for this story for a while now.
I’ve read this fic years ago, it’s a retelling of season 1 with born-a-girl Merlin. The only thing I can remember now is the ending, where Arthur and Merlin have a confrontation at the Isle of the blessed (after Nimueh’s death). Merlin’s magic and feelings are revealed, they make ammends, and they get intimate while on the altar. Some of Merlin’s blood drops on the altar on the isle and it’s alluded to that with the “blood sacrifice,” Merlin becomes the new High Priestess.
Again, hope you guys can help me out. Thanks!
EDIT: Thank you elveatas!
It’s
Evolution by AngelQueen (AO3)