Since I failed at writing a drabble-length piece for my first prompt, let's try again:

Claim: Dream - Trio Era Ravenclaw (not Luna)/Trio Era Slytherin (not Draco) - Potions (not Love Potions)

Edit: Link -- Drabble #1 in the post

Leaving behind:

Dream -- Hagrid, Blast-Ended Skrewt

Nightmare -- Albus, warm woolen socks