Soulcasting is the art of changing one substance to another. It is used for a variety of purposes including food production, construction and repair, healing, and killing. The term 'Soulcaster' can refer either to the individual who can Soulcast or the fabrial that most Soulcasters require in order to Soulcast successfully. Almost all soulcasters are part of the ardentia and need a fabrial to Soulcast.
Soulcasting fabrials can be attuned to particular Essences, but they can theoretically work with all of the Essences.