While spirits need living vessels to inhabit, so as to maintain a presence in the world of the physical, with sufficient creativity, such boundaries can be pushed.
The Craftfather invented Golems so as to twist the rules of magic and create beautiful and fantastical new tools to do him glory. Golems are inanimate vessels who are animated by living spirits. While a spirit requires a living host, with proper design, such a living host can be placed inside of a device, suit of armour or a construct so as to provide it with life. In the age of the First Faloran Empire, rogue spirits would be Bound to such devices, creating Golems. Since the Common Law, Golems are more restrictive and limited, though the Craftfather does his utmost to work around the limitations imposed on him.