Muto Vim spell for discussion, guideline question

[William]

@ironboundtome

Scramble the Conspicuous Spell
Muto Vim (Gen), R: Voice, D: Mom, T:Ind
Scrambles a spell of less than (Level -1 mag). While this effect does not alter the level of power or the R, D, T of the spell it does muddle and wreck the magic being cast, so that the spell casting attempt is foiled.
(Base (level +1 mag), R: Voice +2, D: Mom, T:Ind)

must also include in the wording the typical MuVi rules for affecting other spells:

• must pass a Int + Con vs 9 roll, although I'm not sure why a caster would opt to botch their own casting.
• must exceed the other spells Pen.
• must fast cast if casting against an opponent

If it is indeed valid, then do I as the caster of the Scramble spell also need to penetrate the opposing caster's parma? Or is the spell outside his parma?

I personally like the idea but not as a spont spell (as the prefer to ban it for game balance if you belive in that sort of thing). Make it formulaic. I'd make the caster do an Int + finesse roll instead that would be the per + concentration target of the victim to avoid loosing control of his spell.

Butterfly Effect
Muto Vim (Gen), R: Voice, D: Mom, T:Ind
Superficially change a spell 2x(Level -1 mag) so that the caster risks loosing control of it. In order to be effective, this spell need to root itself as early as possible within the targetted effect and will infect the magic that is its target with that of chaos. As such, this spell only works if it can be delivered prior to the release of it's target effect. The caster suffering from this spell has two choices. One, safely stop his spell casting as normal or roll a per + concentration + mastery vs the agressors Int + finesse + initiative advantage. Should he choose the 2nd option and fail the test, he needs to immediately roll for a botch and add the difference of the test roll as extra botch dices.
(Base 2x(level +1 mag), R: Voice +2, D: Mom, T:Ind)

ps. I know the term Butterfly Effect does not fit medieval times but feel free to rename to "Causality" or something alike

W