|Ancient Armor Remnants|
You only need one Ancient Armor Remnants in order to upgrade a hero's whole armor set.
Note: Once you upgrade a hero's armor, you can switch back and forth without losing anything, but you don't recover the Ancient Armor Remnants.
Ancient Armor Remnants can only be obtained in the Remains of Sahlahja Challenge Mission. It does not drop, but instead appears in players' inventories at random as a reward after killing a Maddened Spirit.
You will not receive Ancient Armor Remnants for every Maddened Spirit you kill. They are randomly given to the player.