COMPLETE Slytherin!Harry. When the BWL is discovered missing, no one thinks twice when Hasan Castell appears at Hogwarts. Abandoned in a muggle orphanage, Harry grows up with a love of magic-in books that is-and thinks sorcery is all in his dreams. He calls himself Hasan to separate his dreams from reality, and is adopted and raised by a man who should be dead.HP/LL mentor!Snape