The Plate of Diminishing is a Divine artifact made by Gnome Divine Iyrite before he and 2 other Divines defacted to become "pure". If attached to any weapon or armor, it will slowly erode them. After 2 minutes of attachment, it will have weakened the inner structure, so it looks fine, but won't hold up. Currently, the Plate is still used by Iyrite, but Nomeag-Bal and his forces do daily checks of their armor and weapons, so its usefulness is diminishing.