My magus has got in mind to create a rather powerful item and i could do with some help working it out. In particular i need to know the rules as they pertain to ring duration and circle target in magic items.
The item in question is a big slab of stone with a stone ring carved into it. Now the item casts an effect similar to Visions of the Haunting Spirits.
Heres the tricky part. I want any spirit that wanders into the circle to become visible and I want this effect to be permanent.
Does a ring duration allow for this or would it only effect spirits inside the circle at the time of casting?
If this is the case, how could i achieve my stated aim?
i.e. does a ring duration on a magic item (assuming of course there is a suitable ring involved) cast only once, and then effect every thing that remains inside its circle, or does it cast on anything that steps into that circle?