This WoW set features the full Heroes’ of Faith transmog, which is the priest tier 7 (10-man) raid set. Heroes’ of Faith is obtained by looting Wrath of the Lich King bosses and purchasing some set pieces straight from the vendor with gold. Dropped tokens can be traded for set pieces via Dalaran tier vendors.
How to Get Priest Tier 7? By purchasing from Dalaran vendors and slaying Naxxramas bosses.
How Many Set Pieces?  Helmet, Shoulders, Chest, Hands, and Pants
Priest Tier 7 Transmog: [10-Man Drop Locations]
Note: Priest have two different sets with the same exact look. Tier 6 priest armor tokens can be used to purchase any of the set pieces.
Head: Helm of the Lost Conqueror [Kel’Thuzad] in Naxxramas
Chest: Chestguard of the Lost Conqueror [Purchase from Vendor] in Dalaran.
Hands: Gloves of the Lost Conqueror [Purchase from Vendor] in Dalaran.
Legs: Leggings of the Lost Conqueror [Thaddius – Gluth] in Naxxramas.
Chest/Hand Vendor (Alliance): Arcanist Ivrenne [37,55] in Dalaran.
Chest/Hand Vendor (Horde): Magistrix Lambriesse [65,23] in Dalaran.
Redeem Token Vendor (Both): Paldesse [43,49] in Dalaran.
Set Name: Heroes’ Garb of Faith (hover for set bonuses)
Shoulder: Heroes’ Mantle of Faith
Chest: Heroes’ Raiments of Faith
Hands: Heroes’ Handwraps of Faith
Legs: Heroes’ Pants of Faith