A value on your character sheet you reference when it comes up.
Definition
Prime is a Sphere rating (0–5) in Mage: The Ascension 20th Anniversary. 0-5 Your rating in this Sphere: higher dots generally means broader and stronger effects.
How to use it
This is the Prime value on your sheet — you reference it when resolving actions or choices tied to it.
Example: I choose a rating for Prime on my sheet (higher usually means I’m better at it).