13 transmog appearances and 1 mount, pet or toy drop in Molten Core.
Crimson ShockerRanged
Flamewaker LegplatesPlate Legs
Giantstalker's EpauletsMail Shoulder
Helm of the LifegiverMail Head
Manastorm LeggingsCloth Legs
Mantle of ProphecyCloth Shoulder
Nightslayer Shoulder PadsLeather Shoulder
Pauldrons of MightPlate Shoulder
Robe of Volatile PowerCloth Chest
Salamander Scale PantsLeather Legs
ShadowstrikeTwo-Hand
Sorcerous DaggerOne-Hand
Wristguards of StabilityLeather WristSign in with Battle.net to see which of these appearances and collectibles you already have, and which of your characters can still loot Sulfuron Harbinger this reset.