Occult Knowledge
The composition of paraphernalia is always specific to the
class of spirit (e.g., shedim, leprechaun, etc.). Identifying the
necessary paraphernalia to call a specific spirit type requires
a Logic + Arcana [Mental] (20, 1 day) Extended Test, though
gamemasters may opt to require that characters earn such
knowledge through game play. This kind of occult lore is often
hidden, inherited, or found only in ancient tomes or folios that
must be found and understood.