Earth's Carbuncle, resistible?

[Lamech]

@Toa

@Adauli

The question comes in with the Invisible Sling of Vilano (HoH:S 38) as it only give the starting movement to the stone and so is considered as nonmagical attack.

The only way I can actually picture that spell circumventing Parma Magica is that it shoots the stone ballistically, meaning it provides the energy to move it up, but natural gravity pulls it back down and thus hits its target with this force regardless of any magic resistance.

Otherwise it's just breaking the rules of how Magic Resistance works as laid out in the core rulebook.

They bring it up in Societates. Basically you are imparting natural motion, and by medieval physics that means the air is pushing the rock. Or something like that.

[Tellus]

@qcipher

Now one last little quirk about this epll. Its target is Part, aren't most Target Part spells aimed?

Not really. Have a look through the Corpus (and possibly Animal) sections.
Plenty of (mostly Muto and Perdo) spells targetting Part, but certainly requiring penetration rather than targetting.