You release it from the fetish with an action point, then spend a magic point to command it to do its effect. It does this until you tell it to go back into its fetish.
Each command attempt costs one 1 Magic Point and requires a Binding skill roll. Depending on the result of the roll the following occurs:
"Again, sorry, because the last post was deleted; but what’s the difference between using the following two techniques to locate spirits?
Scour the mundane world, using Trance to view the Spirit Plane, on the off chance of noticing a suitable specimen.
Shift fully into the Spirit World to search for a specific spirit "