[RPM] Shrinking a Planet?

[vicky_molokh]

Against the argument of 'Fire the size of a state is a Greater Effect' I will have to counter: 'So what about some other, nonetheless state-sized, Lesser Effect?'
If sizes past a certain limit automatically make all effects Greater, it should say so. If it doesn't, then some Lesser effect across a large area will still be way, way more powerful than many of the Greater individual effects.

As for arbitration by GMs, I absolutely agree that some amount of control is required. However, it is really bad form to pick individual spells and cut them down 'because it would not make a good film', so to speak. When I get a magic system for a setting, I pretty much expect that the rules of said magic system will shape the setting, that the setting is built based on clearly discernible consequences of its premises (including its magic systems), and that at least some part of the characters knows these things and uses them the way they work.
See also MagicAIsMagicA.