The outfit consists of a worn top hat, dress shirt with vest, black slacks and sunglasses. The disguise is tolerated in some parts of the first floor but on all other floors it is considered trespassing.
The disguise is located in one of the far wings of the attic. To access the room you must go between two tall cabinets covered in sheets then enter the room with a statue in the middle. The disguise is at the base of the statue in the middle of the room.
The Vampire Magician outfit appears in the following: