The cost of creating a Spirit Weapon depends on the ritual used and the powers gained, but is typically 1-3 POW.
While the user performs the activity he gains the benefits of the Spirit Weapon. If he stops then the abilities are lost until the activities start up again. A Shaman will use these weapons during his Discorporation ritual and can then use them while discorporate, as long as he continues to perform the required activity.
Spirit Weapons have varying effects when used, depending on the powers of the individual items.
Shield - Increases Spirit Combat Defence (by a variable amount, e.g. 1D6, 2D6, or a fixed amount e.g. 10, 20, POW)
Rattle - Adds the user's POW to his Spirit Combat skill (Shamans include their fetch's POW).
Drums - Add user's POW to all friend's Spirit Combat skill within earshot
Pipes - All unintelligent Spirits within earshot will try to move towards the player to listen to the music.
Net - When thrown over a Discorporate Spirit in Spirit Combat, prevents the spirit from disengaging. The combat can only end with the spirit bound or the opponent reduced to 0 MPs and possessed or captured.
Rattle - Doubles damage inflicted on Disease Spirits fought.
Bull Roarer - Doubles the user's POW for the purposes of determining Spirit Combat results