Fiendish Diagram

Games Discussion Ars Magica
1

Hello all

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?

2

It would only affect spirits inside the circle at the time of casting. The spell itself only goes off once.

Unlimited uses for the main spell and a constant linked trigger that detects when a spirit enters the circle.

3

Fruny gave a good answer. I myself am willing to also allow the "it affects everything that enters the ring, but ceases affecting them once they leave the ring" interpretation.

4

I think it could go either way, any that enter are visible while inside, or any that are inside while casting are visible, and could argue either way

I think no matter what, any inside at casting would be visible, after that it depends on what works best for your game.