I'm a new player in Ars Magica and i like this game!
But, i have some hard times to understand the requisites system:
does a requisite ALWAYS have to shift the form/technique for the lowest of the two (or more) form/technique used by the spell?
Wat is the thing with "if the spell could do something without the requisite : +0 magnitudes, if the spell could do something, but significative lesser, +1 magnitude"? Does it mean that, in addition with the point 1) above, i add 1 magnitude at my spell?
For a power (example, power due to the mythic blood virtue), does the requisite enters in count, or not?
I thank you for your answers, and have fun with ArM!