I was just thinking over the spells that will be in elemental, and often when you use a high lvl spell in these kind of games (Age of Wonders for example) it doesnt have a very high impact on the game, sure you can raise mountains and all that and it SHOULD be pretty huge deal.
So, what if; when you are using the highest lvls of spells (I asume the volcano spell is pretty damn high
) it exists a small chance of something going horrible wrong when you use it?
so for example when you raise a volcano there is a small chance that a powerfull firedeamon will be awoken through the volcano and will go on a rampage against the person who awoke him.
also maybe the deamon should be as powerfull as the total force you can muster so it always will be a challange for you to bring it down.