Blackguard's Armor

 is a set of light armor found in.

Location
Glover Mallory's House
 * Can be obtained after retrieving the Ancient Nordic Pickaxe and the Bonemold Formula for Glover Mallory. He will give you a key to his house and his basement, where the armor rests in a display case.

Smithing
Pieces can be upgraded with Leather but doesn't benefit from any smithing perks.

Trivia

 * The Blackguard's Armor Set is essentially an upgraded version of the Thieves Guild Armor.
 * It shares the same appearance with Linwe's Armor Set.
 * The Enchantments on The Blackguard's Armor Set surpass those of The Guild Master Armor Set, making it the best version of The Theives Guild Armor