This story is a sequel to Broken Blossom
Joyous Blossom, the unicorn daughter of Sweetie Belle, is spared from death by Princess Celestia, and is instead given therapy to deal with her problems. What they don't know is that she is far beyond therapy, and she becomes more dangerous than anypony thought possible.
Now it is a race to prevent her from becoming her aunt, a task that is no easy feat. For Blossom is literally built to be the deadliest serial killer that Equestria has ever known.
Spin-off story to Broken Blossom which is a threequel to The Secret Life of Rarity
Cover art by the amazing Viofriedsebe