A/N: This will be simply be a set of Harry Potter challenges. Anything that comes into my head.

Slytherin Weasleys Challenge

- Remus Lupin finds a mysterious spell in the Hogwarts Library in his first year. The upside is that it can decide the house of the person/people it is cast on (so long as they are as of yet unsorted). The downside is that it can only be cast once in the caster's life. He shows it to the Marauders.

Necessary: Peter Pettigrew casts the spell on all seven Weasley children when he is discovered in their house in 1981, just before he escapes. This causes them to all be sorted into Slytherin.

Possible: Sirius Black casts the spell on Regulus to make him a Gryffindor.

Possible: James Potter casts the spell on Draco Malfoy in response to Lucius Malfoy insulting Lily.

No Bashing!

Everything else is up to you.