This WoW set features the full Earthshatterer transmog, which is the shaman tier 3 raid set. Earthshatterer was orginally added in vanilla patch 1.11.0, then removed with the Naxxaramas revamp during Wrath of the Lich King, and finally made available once again in Mists of Pandaria via the Black Market Auction House.
How to get shaman tier 3? By bidding for the pieces on the BMAH.
How many set pieces?  Helmet, Shoulders, Chest, Bracer, Hands, Belt, Pants, and Feet.
Shaman Tier 3 Transmog:
Head: Earthshatter Headpiece by purchasing the helmet from the BMAH.
Chest: Earthshatter Tunic by purchasing the chest from the BMAH.
Wrist: Earthshatter Wristguards by purchasing the bracers from the BMAH.
Hands: Earthshatter Handguards by purchasing the gloves from the BMAH.
Waist: Earthshatter Girdle by purchasing the belt from the BMAH.
Legs: Earthshatter Legguards by purchasing the pants from the BMAH.
Feet: Earthshatter Boots by purchasing the boots from the BMAH.