Used to craft at Bardok or Chunnaic to Legendary Armors. There are 3 types for each build. It is possible to craft it at chapter 1
Heavy
Light
Mage
Armor Pieces are used in groups of 3 to craft LegendaryArmors. There are 9 total in the game before entering the RedTower.
When you have 3 pieces, bring them to Bardok or Chunnaic (must be a member of their faction).