The legs degrade back to unrefined legs after 100,000 charges of combat, where they can be crafted again using more essences. They can also be restored to 100% charge at any time using 2 of each essence (essentially re-creating them). This item can be augmented at an Inventor's workbench using an augmentor and 36 divine charges. Only fully charged items can be augmented - partially used items will need to be repaired first.