18 transmog appearances in Siege of Orgrimmar.
Ancient Archer's ChestguardMail Chest
Ancient Mogu Tower ShieldShield
Arrowflight GirdleMail Waist
Avool's Ancestral BracersCloth Wrist
Bracers of the Pristine PurifierMail Wrist
Chitin-Link Chain BeltMail Waist
Enchanted Shao-Tien SaberOne-Hand
Helm of the Night WatchmanPlate Head
Immaculately Preserved WandRanged
Klaxxi Grips of RejuvenationLeather Hands
Mantid Carapace AugmentsLeather Wrist
Mantid Vizier's RobesCloth Chest
Mogu Mindbender's GreavesPlate Feet
Ominous Mogu GreatbootsPlate Feet
Pandaren RoofsprintersLeather Feet
Plate Belt of the War-HealerPlate Waist
Shado-Pan Reliquary KiltLeather Legs
Untarnishable GreatbeltPlate WaistSign in with Battle.net to see which of these appearances and collectibles you already have, and which of your characters can still loot Spoils of Pandaria this reset.