RPM question

[nudj]

Originally Posted by Christopher R. Rice

FP does not equal energy (as has been noted). That greater effect can exceed the limits of the lesser. That's pretty much it.

I misspoke when is said fatigue. If you are in a battle, 12 energy is hard to gather quickly. When you say “the greater can exceed the limits of the lesser”, what do you mean in the fireball context? Do you mean the GM decides, or do you mean some specific thing that is exceeded with fireball and Greater create energy, that is not exceeded with lesser destroy body.

Please forgive my lack of understanding of something that is probably obvious