Order of Diagna is a heavy armor set.The 5-piece set bonus adds Major Vitality at all times, increasing your Healing Received by 8%.
Order of Diagna is part of the base game and drops in the Alik'r Desert in the Overland content. You can also find it on Guild Traders. Each set item is bound on equip. You can acquire heavy armor, jewelry and weapons for this set in the Redguard motif style.