The spell description for Portal (Space***; M:Aw p 238) gives a casting cost of one mana. It also mentions how the number of successes required is based on the caster's sympathetic connection to the target. This makes it sound like the mana cost is taking into account the sympathetic nature. Or is the mana cost due to the power of the spell, and casting Portal on an unseen target would require a second point of mana?
If the cost does include sympathetic cost, does that mean a mage could cast Portal on a target he can see, such as through an office window, and not have to pay any mana? I guess this is more of a Storyteller's call than a rule adjudication, but I'm curious about what others would do.
Thanks! Mage is an intriguing game, but damn if spellcasting ain't complicated. I have much to study.