Description: Doctor Whooves was looking forward to a long and happy life with Derpy, but lost her. Thrown into a deep depression, he is visited by an old friend, and his life is changed by a transformation of the Doctor himself that breaks all the definitions of who the Doctor really is.
The Doctor Assassin https://www.fimfiction.net/story/232396/1/the-doctor-assassin/chapter-1-transformation
Written by Dashie23