Spell Rules - La Roche Caribet

Spell Changes to the standard spells listed in Ars Magica 4^th Edition

Various small changes across the spell lists.
A discussion of guidelines for Range and Target.
Many Instant spells become Momentary or Permanent, except for Vis-boosted Creo magics which remain Instant.
Perdo Imaginem spells are revised to alter the ease of Invisibility (as discussed in the FAQ (or locally))

Duration of Magics

Momentary spells are there-and-gone, but may leave residual effects which take time to revert or dispel. Extending the duration of any such spells enforces the effect for the spell duration before natural reversion commences (E.g. CrAu Air's Ghostly Form, creates a thick fog Momentarily, which then dissipates over a minute; a Moon duration spell would remain, undissipated by natural effects until the change of moon, and then dissipate like the shorter version. Or, PeCo guidelines for Level 15 - cause one Body level damage - the Momentary spell causes a wound which can immediately start to heal naturally; a Moon duration wound could not heal until the Moon turned.)

Permanent spells have an enduring magic to enforce their effects (until dispelled). Instant spells create Permanent objects which cannot be dispelled, using here-and-gone magics to achieve this in an Instant.

We should not use Instant duration for anything other than undispellable Creation. Other spells listed as Instant should be revised to be either Momentary or Permanent.

Since many spells are affected, the complete list for this is moved to here.

Pages 110-111
PeAn guidelines should state "basic duration is Momentary". (Spell levels are not changed by this).
Pages 115-116
PeAq guidelines should state "basic duration is Momentary". (Spell levels are not changed by this).
Pages 126-127
The guidelines for PeCo are right! I have adjusted the guidelines for PeAn to bring them into line with PeCo...
Pages 132-133
PeHe guidelines should state "basic duration is Momentary". (Spell levels are not changed by this).
Page 139
Restoration Of The Lost Image (Gen.) should have a Duration Momentary.
Page 147-148
PeMe guidelines would be Near, Momentary, Individual to be consistent with other PeXx spells, but this is already equivalent to the quoted Eye, Sun, Individual.

- However Lay To Rest The Haunting Spirit should read Duration: Momentary.

Page 158
PeVi guidelines should state "basic duration is Momentary". (Spell levels are not changed by this). The "make something seem non-magical" effect is correctly stated as duration Sun.

Creo Animal Page 107

The spell Full health Of Beast And Bird should be brought into line with the other restorative CrXx General spells, as an Instant Ritual, and read:

Full Health Of Beast And Bird, Gen., R: Touch/Near, D: Inst, T: Ind, Ritual
Cancels or reverses the effects (other than death) of a malign Animál spell, such as The Falcon's Hood (PeAn 20), if you can match or exceed the level of the spell with the level of this Ritual.

Perdo Imaginem Page 142

We need to visit the PeIm guidelines to revise the difficulty of becoming Invisible, so that we don't have a campaign where the default spell becomes Invisibility, and everyone researches Detect The Invisible as a necessity.

I offer the following (see also the Perdo Imaginem section of the FAQ, or locally).

Rego Vim

The Guidelines for Rego Vim specify Reach and Individual, so a spell for "Protection from Magic" lets you reduce Range from Reach to Personal for -10 Levels, so that a Personal spell offers protection of Level+10.

To render the spell comparable with the Parma Magica, the guideline is reduced to Level-10, so that a Personal Range spell produces protection of Level.