19 transmog appearances in Siege of Orgrimmar.
Belt of Ominous TremblesCloth Waist
Borer Drill BootsPlate Feet
Bracers of the Broken FaultCloth Wrist
Castlebreaker BracersLeather Wrist
Cavemaker WristguardsMail Wrist
Demolisher's Reinforced BeltPlate Waist
Earthbreaker's Steaming ChestplatePlate Chest
Earthripper GlovesCloth Hands
Juggernaut's Power CoreHeld In Off-hand
Laser Burn BracersLeather Wrist
Leggings of Furious FlameCloth Legs
Minelayer's Padded BootsMail Feet
Precision CuttersMail Hands
Ricocheting ShoulderguardsLeather Shoulder
Seismic BoreOne-Hand
Shock Pulse RobesCloth Chest
Tar-Coated GauntletsPlate Hands
Treads of Autonomic MotionMail Feet
Wall-Borer BracersPlate WristSign in with Battle.net to see which of these appearances and collectibles you already have, and which of your characters can still loot Iron Juggernaut this reset.