This passive ability allows you to craft from recipes that use volatile, brilliant, and pristine spirit essences.
Use an Enchanter's Sachel to contain the base item and essences to be crafted. Then use this ability upon the Sachel to craft the item.
To obtain this feat, you must use the strange box upon the Sachel at least once. The Strange Box is found late in the MotB official campaign at the Red Wizard school of Binders and Shapers in Thay.