Merciless Gladiator's Mooncloth Mantle Priest-only PvP reward. The token to buy it drops from Void Weaver in The Eye. ** Update 11/22/2013: Not sure when this changed, but you can now buy this from Kezzik the Striker in Area 52 in Netherstorm for 750 Honor. **
Raiments of the Corrupted Drops in Ulduar 10
Binding of the Dragon Matriarch Drops in Ulduar 10
Pulsar Gloves Drops in Ulduar 10
Royal Boots Green BOE
Tower of the Mouldering Corpse Drops in the Forge of Souls
Deathchill Cloak Made by Tailors. There are a few other cloaks with the same appearance.