Raise / Lower land Mana Cost-- Too High or Too Low
Looking at the changelog of .984 recently there is a change to the raise and lower land cost. People are saying that at the low low price of 5 mana changing the landscape is too low a cost for the power. But some people think that 50 mana is too high a price.
The argument for the price change to be lower is the fact that when you cast lower / raise land it usually isn't once it is several times in a row in order to do anything useful with the spell. For example a land bridge to get off you secluded island-ish start requires you to cast it at least 4 times. That is 200 mana and that is expensive. But is 20 mana too low for such a feat?
I would go for the happy medium of 10 mana per cast to be appropriate for the spell. What are your thoughts on the matter?