[Graeme Dice]

Originally posted by PhilD:
* spending a gem to "power" the spell will let you cast it as if you were 1 level higher - both for reaching the required level, and to take less fatigue. I think it's limited to 1 gem for each spell.

One gem per skill level actually. An astral 8 mage can cast master enslave with no communicants by spending enough extra astral pearls.