The Darkest Arts

The year is 1995. The wizarding world is in a frenzy over the return of Voldemort, and the Ministry of Magic is desperately trying to push propaganda proclaiming it as false. The Order of Phoenix prepares for an unpredictable threat. It is during this dark hour that an interesting proposition is presented to Albus Dumbledore. Edward H. Blackwood, a former Slytherin, will teach a class at the school with minimum pay - but the class is on one of the darkest types of magic of all. Dumbledore reluctantly agrees.

But as students regret the summer slipping through their fingers, Alice Quinn regrets the year she does not remember. She has been missing since her departure at the end of her fourth year. The only clue to her missing memory is the odd tattoo on her arm; one that, eerily enough, does not come off no matter what spell is cast. And there's the flashes she gets, flashes where she vividly remembers doing horrible, horrible things.

And those things all involve Hogwarts' newest teacher.

[Crossover between Harry Potter and the Bartimaeus Trilogy, but no knowledge of the latter is need.]