Infiniti2000 said:That's really not an appropriate argument, however. It's not like you have to spend 3% to gain the remaining 97%. Balance-wise, stoneskin should be equal to any other 4th-level spell. If I can win the fight with stoneskin, I should be able to win it with another 4th-level spell that doesn't even cost the 3%.
So, my opinion on this is that I have the general philosophy that spells should not have high gold piece costs unless it really makes sense and is required for balance.
And that's precisely why Stoneskin has a GP cost.
Stoneskin effect-wise is more powerful than most 4th level spells. It is more like a 7th level spell (with Heal being 6th, Stoneskin can save hit points way ahead of time by being cast before combat, Heal cannot and Heal has to wait until 10 per level points is cast, else it is partially wasted, the only real advantage of Heal is that it also heals damage which is not combat oriented). And, Stoneskin also can easily last for multiple combats.
The balancing factor to other 4th level spells for Stoneskin is the GP cost. It can be used in relatively dire circumstances, but typically is not.
As can be seen by the results of this poll, very few people use the spell on a regular basis. Without the GP cost to balance the spell, the use of the spell would increase dramatically.
Part of the problem WotC has is that it has some (almost sacred cow) history with many of its DND spells. Hence, it has to balance out spells that are lower level than they should be higher level with either GP, XP, or both.