So I was considering this spell:
Unraveling the Billowing Sail
The magus sets his sight on the sail of a vessel and the magic destroys the weave of the sail. The hemp or linen fabric pulls itself apart in even the most mundane wind.
Herbam, would the base have to be 4 to destroy an amount of dead wood? It seems high. What about base 3, it says spoiling food, that is not helpful at all. Is there a 3.5? Nope. So am I stuck at base 4? It seems.
so then the spell is: base 4, R: Sight +3, D: Mom, T: .....
Target: Individual? Probably not. So either Target: Part or Target: Group. I would suppose Part, because if Group then you would have to probably increase +1 for size if you come across a sail larger than 10 paces square, which I think could be possible in the Aegean Sea; or maybe not.
That makes it at the very least: base 4, R: Sight +3, D: Mom, T: Group +2, a level 25 spell which would destroy a 10 pace, square sail. If the sail is bigger either the spell would not work or you would have to use the Level 30 spell, which you might as well make to begin with.
So Target: Part would be the cheapest bet. You are targeting a single panel of linen... is there a discreet part to even target in a linen or flax sail? Would Target: Part literally be a line of the linen. At least you would get: base 4, R: Sight +3, D: Mom, T: Part +1, a nice Level 20 spell. Barely any better considering you had been looking at cloth sail and doing the damage with a Level 5 or 10 spell.
I suppose one could reduce it to voice, but seriously if you can get within voice range then you could get within range to simply attack.
So I am hoping to reduce the base by one, and having some Ars to back it up, so I can get a Level 15 Spell that I can toss out a few times and ruin a nice merchants day.
Mostly I am looking for discussion and reasoning... but also trying to practically get away with not having to make a Level 25 or higher spell.
PS. I could target the rigging... the rope I suppose was flax or hemp eh? base 4 still? base 4, R: Sight +3, D: Mom, T: Ind it's Level 15 and cheap, but it lacks the flair of the sail simply turning to shreds and letting those aboard know they are at the mercy of a pirate's good will.