OK SO. THE HOGWARTS STAFF AU. HERE IS WHAT I GOT.
-Thorin comes from the ancient and honorable house of Durin, with the same history of greatness and madness. Their main redeeming point these days is they were against Voldemort. But they were a family known for creating ridiculously powerful magic-laden gems and spell gems.
(way more under cut)
Garrus/Cassandra. "The monsters look different here."