Mages and scripted spells

[thejeff]

Very high fatigue cost also affects how high you need to boost your level to drop the resulting fatigue down below 200.
Imaginary Spell B is probably too extreme, but an A7, 7 gem spell cast by an A10 pretender with 3 boosters= A13 and an extra gem for A14 would be 87 fatigue, so it is possible even for very high gem cost spells.

More commonly it also affects how quickly communion slaves used to cast the big spells die. They are not limited to 200 fatigue.

Also, I'm not sure, but I believe the AI will use an extra gem to reduce fatigue, even if it doesn't get reduced below 200. An A10 mage casting Imaginary spell B would use 10 gems and take 300 fatigue capped to 200.