Fan Fic / Ace of Spades

Ace of Spades by LeontinaStardust available on and Archive of Our Own is a Batman: The Dark Knight and Harry Potter Crossover and Slash Fic (The Joker/Harry Potter, Poison Ivy/Harley Quinn).

After saving the world Harry gets PTSD and loses control of his magic, accidentally killing Ginny Weasley. The Magical World, not wanting to get their hands dirty with charging their world's savior quietly strips Harry of his wand and has him secretly sent to a Muggle Asylum. Forsaken by the very people he saved Harry is shuffled between various mental institutions; none of which are prepared to help a wizard and Harry's condition worsens into full on psychosis. Harry ends up in Arkham where he makes the acquaintence of a mad doctor with a burlap sack over his head that wants to use him in his experiments, a police officer that is actually concerned about his well-being, and a fascinating man with scars on his face who also wants to see the world burn...

(Has nothing to do with the video game of the same name.)

Ace of Spades provides examples of:

  • Crazy Jealous Guy: The Joker is jealous of the time Harry spends with Bruce Wayne and of the attention Harry gives to stalking Jim Gordon.
  • Death Dealer: Harry as Ace.
  • Discard and Draw: Harry loses access to all his magic for a time but comes to be able to perform wandless magic summoning fire very well.
  • Dragon-in-Chief: Harry Potter / the Ace of Spades is much more powerful than the Joker but the Joker makes it clear who's in charge.
  • Psycho Ex-Girlfriend: Averted. Harley Quinn is psycho and the Joker's ex-girlfriend but she's moved on and bears no animosity towards the Joker or Harry.
  • Title Drop: Harry's new villain name is Ace of Spades.
  • Unreliable Narrator: Harry is nuts, so his perceptions are a bit skewed.
  • Unwitting Pawn: Harry to whatever the Joker has "not" planned. Harry wants to burn the world down but it's also pretty clear he's being deceived...
  • Wholesome Crossdresser: After escaping Arkham Harry is eager to get out of the straight-jacket even if it means wearing Harley's clothes.