as long as you dont start lvling in spellcraft, then you cant get a - to saves if it is lowered from whatever you get hit with. I get that. Its like Open Locks, if you have 0 points in it, you cant even try, if you have 1 point then you can try at least. Same with alot of the skills that you need training in, remove trap, set trap are examples i think.
And i had no idea the spellcraft worked that way, thanks pritty cool.