23 transmog appearances in Naxxramas.
Accursed Bow of the EliteRanged
Bands of Mutual RespectMail Wrist
Bindings of the Expansive MindCloth Wrist
Boots of Forlorn WishesCloth Feet
Bracers of the Unholy KnightPlate Wrist
Chestpiece of SuspicionLeather Chest
Cloak of DarkeningCloth Back
Esteemed BindingsLeather Wrist
Faithful Steel SabatonsPlate Feet
Gauntlets of Guiding TouchPlate Hands
Girdle of LenienceLeather Waist
Girdle of RazuviousPlate Waist
Girdle of RecuperationMail Waist
Iron Rings of EnduranceMail Wrist
Leggings of the InstructorCloth Legs
Legplates of Double StrikesPlate Legs
Mantle of the Extensive MindCloth Shoulder
Plated Gloves of ReliefPlate Hands
Rapid Attack GlovesLeather Hands
Scepter of Murmuring SpiritsHeld In Off-hand
Shoulderpads of Secret ArtsMail ShoulderSpaulders of EgotismLeather Shoulder
Waistguard of the TutorPlate WaistSign in with Battle.net to see which of these appearances and collectibles you already have, and which of your characters can still loot Instructor Razuvious this reset.