WoW Transmog — Browse All Transmog Sets
Browse all 3,100+ World of Warcraft transmog appearance sets. Filter by expansion, armor type (Cloth, Leather, Mail, Plate, Cosmetic), and PvP sets. Track your wardrobe completion across all expansions.
Browse transmog sets from raids, dungeons, PvP, and quests across all expansions. Filter by armor type (plate, mail, leather, cloth) and source. Track which appearances you own and which you still need via Battle.net sync.
Attire of Piety
Cloth set. Mists of Pandaria. I'm very tempted to make a character named Abhorsen just so I can wear this.
Attire of Piety is a transmog set obtained from naval missions that reward Hellfire Citadel raid chests.
Unlock naval missions
Complete enough Hellfire Citadel raid kills to trigger naval missions; approximately 12–15 heroic HFC kills are required for heroic-quality mission chests to appear.
Complete naval mission
Accept and complete a naval mission that rewards 
containing heroic-quality Hellfire Citadel loot.
Open mission chest
Open the to obtain a piece of Attire of Piety; the chest contains armor pieces but not set items, weapons, or class trinkets.