Muto Vim Guideline clarification

The Ars Magica Muto Vim guidelines in the official errata state that a MuVi spell only needs to be present for the length of the spell casting time, not matched to the duration of the changed spell. 

I’d not realised that rule was in place, and especially the implication that it has for ritual spells which can take hours rather than a moment to cast. 

Clearly then the intent is that the Muto Vim spell alters the way the magical effect forms before execution. This makes a kind of sense to me from a programming perspective; this alters the script just before it is run. 

Discussion – http://forum.atlas-games.com/viewtopic.php?f=4&t=31300&start=15

Note to self – this is about as meta as Ars Maguca gets, I’m enjoying the banter in the forum link. Openly acknowledge how bizarre this post would be to a non ArM player.  

Happy spell casting folks. 

List of Ars Magica Ranges, Durations, and Targets

600px-Alberti_cipher_diskHere is a list of Ars Magica spell Ranges, Durations, and Targets; compiled from the official spell guidelines and also from various quasi-official places by Gremlin44. Written on the Ars Magica forums (the source post for this contains all the official ones into a darn handy post in Feb 2014), other source books, and other new ideas I’ve added at the end.

Thank you Gremlin44, legendary post. Continue reading

Fixing my Creo effects

After some banter in a game of Ars Magica RPG I’ve been corrected in my understanding of how Creo magic works. Till now I thought that Creo spells never required a Finesse skill check to cast, unless they were creating a very specific item to the caster’s desire.

Particularly I thought any natural item will always be fine, and if that Finesse check passes for an unnatural thing the item should be fit for purpose (with the natural vs unnatural thing being very generous). I thought the Finesse roll was almost always required by Rego spells which emulate crafting activity, because the Rego activity is constructing the item rather than conjuring it fully formed. Thus I was wrong that Creo only really needed Finesse rolls for style, appearance, or presentation of an item.

The core rules state that Creo effects must use a Finesse check if the thing conjured is artificial. Further if the Finesse check botches then the item is not fit-for-purpose. As a guideline it does not provide much more than that.


(the Theory of Forms only has room for natural things? A shame to miss the humble chair)
Continue reading