22 transmog appearances and 1 mount, pet or toy drop in Blackwing Lair.
Angelista's GraspCloth Waist
Ashjre'thul, Crossbow of SmitingRanged
Bloodfang SpauldersLeather Shoulder
Chromatic BootsPlate Feet
Chromatically Tempered SwordOne-Hand
Claw of ChromaggusOne-Hand
Dragonstalker's SpauldersMail Shoulder
Elementium Reinforced BulwarkShield
Elementium Threaded CloakCloth Back
Empowered LeggingsCloth Legs
Epaulets of Ten StormsMail Shoulder
Girdle of the Fallen CrusaderPlate Waist
Judgment SpauldersPlate Shoulder
Nemesis SpauldersCloth Shoulder
Netherwind MantleCloth Shoulder
Pauldrons of TranscendenceCloth Shoulder
Pauldrons of WrathPlate Shoulder
Primalist's Linked WaistguardMail Waist
Shimmering GetaCloth Feet
Stormrage PauldronsLeather Shoulder
Taut Dragonhide GlovesLeather Hands
Taut Dragonhide ShoulderpadsLeather ShoulderSign in with Battle.net to see which of these appearances and collectibles you already have, and which of your characters can still loot Chromaggus this reset.