1. Yes. The cost of the enhancement. You have to be pretty potent to drop a 10d6 fireball!
2. General enhancements do not cost. Just the one listed under list of skill-delineated magical enhancements. Though I do know one GM who house rules that General Enhancements key off the spellcraft skill, which I thought was a little harsh, but he was running a low-magic world.
3. I wouldn't worry about it myself. If you create food, it lasts till you eat it unless it expires before then. Once you've eaten it, it's done. I guess you could get super biological with that, but I don't think that would add anything to the game.
2. General enhancements do not cost. Just the one listed under list of skill-delineated magical enhancements. Though I do know one GM who house rules that General Enhancements key off the spellcraft skill, which I thought was a little harsh, but he was running a low-magic world.
3. I wouldn't worry about it myself. If you create food, it lasts till you eat it unless it expires before then. Once you've eaten it, it's done. I guess you could get super biological with that, but I don't think that would add anything to the game.
