Ring of protection from demons

Games Discussion Ars Magica
1

I want to crate an enchanted ring (to be worn on a finger) continuously protecting the wearer from demons with Might at most 20.

I'm using the ReVi Gen guideline "Ward the target against creatures with Might less than or equal to the level of the spell. (Touch, Ring, Circle)". Since Ring and Circle are the same level as Sun and Individual, I suppose I can get a spell of the same level with (Touch, Sun, Ind).

The item has an effect level of 34 (ReVi 20 spell, +1 level for 2 uses/day, +3 levels for Environmental Trigger, +10 levels for Penetration +20) and is always on, so one would need to take off the ring to stop the effect.

I suppose I could also change the spell to (Touch, Conc, Ind), which is one magnitude lower, so a ReVi 15 spell would suffice to ward against a Might 20 demon.

Then the item would only need an effect level of 31 (ReVi 15 spell, +1 for 2 uses/day, +5 levels for item maintains concentration, +10 levels for Penetration +20). This item would also be always on, but the wearer needs to concentrate at sunrise/sunset to perpetuate the effect. This also makes it possible to always wear the ring and only activate it when needed to avoid warping.

Is it possible to modify the guideline like I did? Is there anything I overlooked?

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2

It’ll warp the wearer if they wear it for long enough.

You might want to put in a bit more penetration so it’ll still affect Might 20 demons if you go into places with Infernal Auras (and / or its activation goes off somewhere that has a penalty to its penetration).

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3

You’re right, I hadn’t considered that. I guess an additional 3 levels for +6 Pen should do it.

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