I'm trying to figure out Terra Mystica by myself. One thing I'm having trouble with is the spades used for terraforming. The rules seem very clear that these need to be used immediately — they can't be saved for future actions. (And that's backed up by the simple fact that there's no tokens or other representation.) But, there are number of ways you can earn spades during actions other than Transform and Build — and even outside of actions, as in the Cult of Earth spade bonus.
Is terraforming / terrain transformation just a thing you can do whenever you get spades?