Primeval Armor Remnants are a special reward trophy that is used to upgrade the visual appearance (but not the stats) of the armor of all Nightfall heroes: Koss, Dunkoro, Melonni, Acolyte Jin, Acolyte Sousuke, Tahlkora, Zhed Shadowhoof, Margrid the Sly, Master of Whispers, Norgu, Goren, General Morgahn, Zenmai, Olias, and Razah.