Miraclous items have the very essence of Mother Nature only waiting to be extracted. There is even a tool for that sold in Alchemist Shops everywhere. There is of course a part of Natures essence to be extracted and the chance to successfully extract it depends on the amount of this certain level of Her care bestowed on the item. The chance roughly is Current Durability divided by 156 yet not less than 5% and no higher than 50.

In order to enchant an item with such an essence you will need a blueprint matching the level of the item you want to enchant and the item itself. Blueprints are known to be sold by certain dwarves in the depths of Undercity.