5 transmog appearances in Temple of Ahn'Qiraj.
Burrower BracersCloth Wrist
Don Rigoberto's Lost HatCloth Head
Larvae of the Great WormRanged
Wormhide BootsLeather Feet
Wormscale BlockerShieldSign in with Battle.net to see which of these appearances and collectibles you already have, and which of your characters can still loot Ouro this reset.