I challenge anyone and everyone to write a Harry Potter crossover with Percy Jackson & the Olympians WITHOUT any of these things:
Demigods being sent to protect Harry
Any new teachers
Demigods enrolling in Hogwarts
People joining the Order
Harry being the child of some god or another
Any of Harry's friends being the child of some god or another
Reincarnation
Percy and Harry (or any other two characters) being related somehow
Anyone being younger or older than they would already be
Adult HP characters or their children
Dumbledore knowing everything because Dumbledore (it gets old)
Everyone ignoring the fact that Ron has a prissy brother named Percy (I mean come on! No? Okay...)
People of authority keeping secrets about the other magic world from the main characters
Pairing anyone with anyone whose relationship with them isn't canon (personal preference)
Constantly going on about how the main heroes are exactly the same
OR
Being just a few short paragraphs long. 'Cause that's boring as Hades.
