Sequel to The Arithmancer. Years 5-7. Armed with a N.E.W.T. in Arithmancy after Voldemort's return, Hermione takes spellcrafting to new heights and must push the bounds of magic itself to help Harry defeat his enemy once and for all.

The Wizarding World is convinced of Voldemort's return a year early, but the Dark Lord is neither a fool nor one to let grass grow under his feet. Indeed, he has already started to cull out anyone who can work against him. Will Sherlock, John, and Harry defeat Voldemort and his schemes before it is too late? The sequel to A Study In Magic. Sherlock HP crossover

After Sirius's death, Harry devotes himself to learning magic in a desperate attempt to protect the people he loves. Warnings: Profanity, Extreme Violence, References to Non-Con -Not of Main Character-, Dark/Questionable Harry