Not sure if this is a bug, but in the change log it says it is now supposed to cost 3 essence to revive the land, and it does when you use the "revive land" spell. However, if you just choose to build a city (without reviving the land) it only costs 1 essence. I'm not sure if this is an intentional game mechanic, and if it is, I'm not sure the point of the spell costing 3 essence. ~ModernKnight