This WoW set features the full Heroes’ Redemption transmog, which is the paladin tier 7 (10-man) raid set. Redemption 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 Paladin Tier 7? By purchasing from Dalaran vendors and slaying Naxxramas bosses.
How Many Set Pieces?  Helmet, Shoulders, Chest, Hands, and Pants
Paladin Tier 7 Transmog: [10-Man Drop Locations]
Note: Paladins have three different sets with the same exact look. Tier 6 paladin 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): Griselda Hunderland [46,28] in Dalaran.
Set Name: Heroes’ Redemption Battlegear (hover for set bonuses)
Shoulder: Heroes’ Redemption Shoulderplates
Chest: Heroes’ Redemption Chestpiece
Hands: Heroes’ Redemption Gauntlets
Legs: Heroes’ Redemption Legplates
Set Name: Heroes’ Redemption Regalia (hover for set bonuses)
Shoulder: Heroes’ Redemption Spaulders
Chest: Heroes’ Redemption Tunic
Hands: Heroes’ Redemption Gloves
Legs: Heroes’ Redemption Greaves