Ahzidal's Armor

 is a unique set of Ancient Nord Armor found in.

Despite being identical in appearance, it has a higher base armor rating and weighs more than the Ancient Nord armor set. It matches steel plate armor in terms of armor rating.

Acquisition
All pieces can be obtained in Kolbjorn Barrow during the various stages of the quest "Unearthed".

Smithing
Pieces can be upgraded with a steel ingot at a workbench and benefit from the Steel Smithing perk, which doubles the improvement.

Enchantment
Wearing four relics of Ahzidal grants the following:
 * Ahzidal's Genius - Fortify Enchanting: 10 points