This is set in the Sherlock universe but alchemy works there. This is a very interesting story. Especially how a lot of elements from both Sherlock and Fullmetal Alchemist are included in the story. It also has a ambiguous ending that is very heartwretching. This is the first story I can honestly say that I wanted to recommend.
FanficRecs Comment by Equivalent Exchange
This is set in the Sherlock universe but alchemy works there. This is a very interesting story. Especially how a lot of elements from both Sherlock and Fullmetal Alchemist are included in the story. It also has a ambiguous ending that is very heartwretching. This is the first story I can honestly say that I wanted to recommend.