This WoW set features the full Heroes’ Dreadnaught transmog, which is the warrior tier 7 (10-man) raid set. Dreadnaught 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 Warrior Tier 7? By purchasing from Dalaran vendors and slaying Naxxramas bosses.
How Many Set Pieces?  Helmet, Shoulders, Chest, Hands, and Pants
Warrior Tier 7 Transmog: [10-Man Drop Locations]
Note: Warriors have two different sets with the same exact look. Tier 6 warrior armor tokens can be used to purchase any of the set pieces.
Head: Helm of the Lost Protector [Kel’Thuzad] in Naxxramas
Chest: Chestguard of the Lost Protector [Purchase from Vendor] in Dalaran.
Hands: Gloves of the Lost Protector [Purchase from Vendor] in Dalaran.
Legs: Leggings of the Lost Protector [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’ Dreadnaught Battlegear (hover for set bonuses)
Shoulder: Heroes’ Dreadnaught Shoulderplates
Chest: Heroes’ Dreadnaught Battleplate
Hands: Heroes’ Dreadnaught Gauntlets
Legs: Heroes’ Dreadnaught Legplates