From publisher blurb:
The spiritualist monk is a "minor magecraft" class, which interacts with the magecraft features of the Magus class. These classes are designed to be setting-appropriate to the material the Magus is used for, while allowing players to utilize other classes and not be tied down to a full spellcaster. More will be made available!
Dipping into the world of magecraft , spiritualists generate mana as they would ki within their own body, finding a balance that lets them work synonymously. They work as exorcists, seeking out those plagued by the machinations of the walking dead or fiends, and expelling them from the world.
Monks of this sort rarely consider themselves to be mages. They are not unaware of the typical uses of mana or its relation to magecraft, but they consider it to be an inherent human attribute like ki, the soul, and the body. As such, they are not directly aligned to any body of mages or to the Holy Church, though their path in life may take them in those directions