Questions about shapeshifting spells

[ExarKun]

It's that.

bemol: you could need penetration to turn yourself if you are, for example, under a parma restricta effect...

[Lasse_Rohde]

@ExarKun

2. it's not a "focus" in the hermetic term. It's a bonus to shapechanging. If you do not like the idea of something "hermetic", you can plainly say: +9 to all shapeshifting roll, which would worth for shapeshanging ability aswell .

... And penetration remain an issue for such character, since shapechanging spells are higher levels than immediate destruction spells. This major supernatural virtue would give him an equivalent power, but in a narrow field...

4. What was important was to say: if you do not add something, the major virtue stinks. And "something" could be a focus like bonus or a fixed bonus. The fixed bonus make more sense if you are considerating this virtue as supernatural also, the focus like if it's only for an hermeticaly integrated ex miscellanea tradition.

Thanks, again for the comments.
I agee with the constant bonus making the virtue more flexible in terms of which characters could choose it. But maybe it is not neccessary. I'll check with my Troupe whether 'a +9 bonus', or 'a doubled lowest applicable art' sounds best to them.
Since i agree with the MR being an issue, but don't really want to boost Shapechanging in general I'll make a limiting wording in the bonus. I don't want to make people capable of spont. casting these spells without spending fatigue, or make it easier turning yourself into a Dragon. So the bonus applies only to Penetration totals when considering whether the Shapechanged character penetrates Magic Resistance or not.